AI Halloween Costume Try-On: See Yourself in 20 Costumes
By gptmelo · Published October 6, 2026 · 16 min read · prompts
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Buying a Halloween costume you will hate in the mirror is expensive. Upload a full-body or half-body photo, paste this into Gemini (Nano Banana) or ChatGPT Images, and preview the outfit on you first.
Edit this photo into a full-body Halloween costume try-on. Keep [my face] exactly the same, including skin texture, eye shape, and hairline. Dress me as a classic vampire: black high-collar cape with wine-red lining, white shirt, dark trousers. Stone hallway, one candelabra, cool moonlight. Photorealistic, vertical 3:4, closed mouth, five fingers on each hand, no extra limbs, no text, no watermark.

Sample: generated with Gemini, 3:4. Scene still, not a locked selfie. Upload your photo so the face can match. Fill [brackets]. If likeness slips, send keep the face exactly the same. Atmosphere portraits: Halloween AI photo prompts.
How to use these costume try-on prompts
- Upload a full-body or half-body photo. Stand straight, even light. A tight selfie is too cropped for a cape or banana suit. Skip beauty filters.
- Paste the prompt into Gemini or ChatGPT Images and fill
[brackets]. - Fix with a short follow-up. One correction at a time.
Follow-ups:
Keep the face exactly the same. Do not beautify or change the age.Keep my original body proportions, height, and hair. Only change the clothes.Two hands, five fingers each. Fix melted hands. Keep shoes matching the costume.
Best on Gemini / Best on ChatGPT are typical expected looks, not a lab test. Samples are Gemini scene stills, not a face-lock from your selfie.
Classic Halloween costumes (5)
Vampire cape
Edit this photo into a full-body Halloween costume try-on. Keep [my face] exactly the same, including skin texture, eye shape, and hairline. Dress me as a classic vampire: black high-collar cape with wine-red lining, white shirt, dark trousers. Stone hallway, one candelabra, cool moonlight. Photorealistic, vertical 3:4, closed mouth, five fingers on each hand, no extra limbs, no text, no watermark.
Best on Gemini: Fabric folds and candle color.
Best on ChatGPT: May add fangs.

Tip: Keep my original eye color.
Witch cloak and staff
Edit this photo into a full-body Halloween witch costume try-on. Keep [my face] exactly the same. Moss-green wool cloak, simple pointed hat that does not cover my hairline, wooden staff in [my right hand], herb kitchen, soft window light. Photorealistic, vertical 3:4, five fingers, no cartoon hat, no extra limbs, no text.
Best on Gemini: Wool texture without hiding the face.
Best on ChatGPT: Hats swallow hair.

Tip: Name which hand holds the staff.
Museum mummy wraps
Edit this photo into a full-body mummy costume try-on. Keep [my face] clearly visible between cream linen bandage wraps. Dark undershirt in the gaps, museum gallery at night, warm spotlights. Photorealistic, vertical 3:4, five fingers, no gore, no CGI corpse skin, no text.
Best on Gemini: Wraps on a living person.
Best on ChatGPT: Can cover the face.

Tip: Add keep lips and chin visible if the mouth disappears.
Moonlit werewolf (makeup, not a mask)
Edit this photo into a full-body werewolf Halloween costume try-on. Keep [my face] recognizable: same bone structure and eyes. Muted brown-gray werewolf makeup, subtle sideburns, torn charcoal shirt, forest at night, moonlight. Photorealistic, vertical 3:4, makeup and shoulder fur, not a plastic mask, five fingers, no snout replacing my nose unless I ask, no text.
Best on Gemini: Makeup on skin vs a wolf-head swap.
Best on ChatGPT: Often replaces the head.
Tip: Skip snouts on the first pass.
Bone-print skeleton suit
Edit this photo into a full-body skeleton Halloween costume try-on. Keep [my face] exactly the same. Black fitted jumpsuit with a white bone print that follows my real proportions, dark studio, beauty-dish lighting. Photorealistic, vertical 3:4, printed costume not a CGI x-ray, five fingers, no extra ribs, no text.
Best on Gemini: Print usually sits on fabric.
Best on ChatGPT: May turn you transparent.
Tip: Match the bone print to my actual torso length.
Pop-culture style looks (appearance only, 5)
Describe a look, not a licensed character. Do not put studio or hero names in the prompt.
1920s gangster suit
Edit this photo into a full-body 1920s gangster costume try-on. Keep [my face] exactly the same. Pinstripe three-piece suit, fedora, pocket-watch chain, brick alley at dusk. Period clothing only. Photorealistic, vertical 3:4, five fingers, no firearms, no logos, no celebrity likeness, no text.
Best on Gemini: Tailoring usually looks real.
Best on ChatGPT: Hats sit too low.

Tip: Keep my original hair color visible at the temples.
Space explorer utility suit
Edit this photo into a full-body space-explorer costume try-on. Keep [my face] exactly the same. Silver-and-navy utility suit, helmet tucked under [my left arm] so my face stays uncovered, hangar, cool overhead lights. Photorealistic, vertical 3:4, five fingers, no franchise logos, no chest emblems, no text.
Best on Gemini: Visor-off portraits lock the face better.
Best on ChatGPT: Helmets glue shut.

Tip: Ask for scuffed boots and practical webbing, not chrome CGI armor.
Pirate captain on deck
Edit this photo into a full-body pirate-captain costume try-on. Keep [my face] exactly the same. Weathered navy coat, tricorn hat, leather belt, wooden ship deck at golden hour. Photorealistic, vertical 3:4, five fingers, no hook unless I ask, no copyrighted characters, no text.
Best on Gemini: Coat texture and sunset color.
Best on ChatGPT: May add an eyepatch.

Tip: Keep my original facial hair if you already have a beard.
Rooftop cape hero (generic)
Edit this photo into a full-body rooftop-hero costume try-on. Keep [my face] exactly the same. Plain [navy] fitted suit, simple short cape, no chest emblem, city rooftop at night, practical boots. Photorealistic, vertical 3:4, five fingers, no logos, no copyrighted characters, no text.
Best on Gemini: Ban emblems twice.
Best on ChatGPT: Invents symbols.
Tip: Pick a color in the brackets so the palette stays generic.
Desert wanderer cloak
Edit this photo into a full-body desert-wanderer costume try-on. Keep [my face] exactly the same. Sand-colored layered cloak, cloth wrap at the neck not covering the mouth, scuffed boots, canyon at late afternoon. Photorealistic, vertical 3:4, five fingers, no sci-fi helmet, no logos, no text.
Best on Gemini: Cloth layers look photographic.
Best on ChatGPT: Scarves hide the mouth.
Tip: Skip glowing swords so it reads as a traveler.
Cute and funny costumes (5)
Porch pumpkin suit
Edit this photo into a full-body pumpkin Halloween costume try-on. Keep [my face] exactly the same. Round orange pumpkin suit with a leafy green collar, porch with jack-o-lanterns, evening string lights, smiling. Photorealistic, vertical 3:4, cute not scary, five fingers, no text.
Best on Gemini: Round foam on a real body.
Best on ChatGPT: May cartoon you.

Tip: Keep my original height.
Sidewalk banana suit
Edit this photo into a full-body banana costume try-on. Keep [my face] visible in the costume opening. Yellow banana mascot suit, city sidewalk, daylight, funny, still a real adult. Photorealistic, vertical 3:4, five fingers, no logos, no text.
Best on Gemini: Face window often holds.
Best on ChatGPT: Face melts into foam.

Tip: Use a full-body source photo.
Inflatable-style dinosaur
Edit this photo into a full-body dinosaur Halloween costume try-on. Keep [my face] visible in the chest or neck window of a green inflatable-style T-rex suit. Suburban driveway, daylight, funny. Photorealistic, vertical 3:4, adult wearer, five fingers if hands show, no cartoon drawing, no text.
Best on Gemini: Person inside a suit.
Best on ChatGPT: May draw a dinosaur.
Tip: Say short arms of the suit, my real face in the window.
Burger mascot
Edit this photo into a full-body burger-mascot costume try-on. Keep [my face] visible. Stacked bun, lettuce, and patty foam layers, checkered diner floor, warm interior light. Photorealistic, vertical 3:4, adult, five fingers, no restaurant logos, no text.
Best on Gemini: Food layers stay as costume pieces.
Best on ChatGPT: Turns you into food.
Tip: Describe sesame seeds and lettuce. Do not name a chain.
Adult sheet ghost
Edit this photo into a full-body adult sheet-ghost costume try-on. Keep [my face] recognizable in neat eye holes. White bed sheet, living-room fairy lights, warm lamp light, smiling, not scary. Photorealistic, vertical 3:4, adult only, five fingers if hands show, no horror, no text.
Best on Gemini: Eye holes warp faces. Plan a second pass.
Best on ChatGPT: Same. Follow with keep the face inside the eye holes exactly the same.

Tip: Use a standing photo.
Last-minute DIY costumes (5)
Preview first, then build with household stuff. Lists are starting points, not shopping links.
Cardboard-box robot
Edit this photo into a full-body last-minute DIY cardboard-robot costume try-on. Keep [my face] exactly the same. Silver-painted cardboard boxes for torso and arms, bottle-cap buttons, kitchen floor, homemade look. Photorealistic, vertical 3:4, five fingers, no polished CGI armor, no logos, no text. DIY materials: two medium boxes, silver paint or foil, bottle caps, packing tape, scissors, black long sleeves.
Best on Gemini: Cardboard edges look real.
Best on ChatGPT: Over-smooths into movie armor.

Tip: Cut the neck hole after you see where it sits.
Kitchen-foil knight
Edit this photo into a full-body last-minute DIY foil-knight costume try-on. Keep [my face] exactly the same. Crinkled kitchen foil over a hoodie, cardboard sword wrapped in foil, living room daylight, homemade. Photorealistic, vertical 3:4, five fingers, not CGI plate armor, no logos, no text. DIY materials: two rolls of foil, cardboard sword, gray or silver hoodie, tape, belt.
Best on Gemini: Foil crinkle reads as kitchen foil.
Best on ChatGPT: Goes full plate mail.

Tip: Cover the torso first; sleeves shred foil.
Black-bag bat wings
Edit this photo into a full-body last-minute DIY bat costume try-on. Keep [my face] exactly the same. Black t-shirt, bat-wing shapes cut from black trash bags and taped to my arms, apartment hallway. Photorealistic, vertical 3:4, five fingers, homemade, no latex superhero suit, no logos, no text. DIY materials: two large black bags, black t-shirt and pants, packing tape, scissors, optional plastic headband ears.
Best on Gemini: Plastic-bag shine is a useful tell.
Best on ChatGPT: Turns bags into leather.

Tip: Tape wings to sleeves, not skin.
Paper-bag scarecrow
Edit this photo into a full-body last-minute DIY scarecrow costume try-on. Keep [my face] exactly the same. Plaid shirt, straw poking from cuffs (paper shreds or raffia), brown paper-bag patches, porch with one pumpkin. Photorealistic, vertical 3:4, five fingers, face not covered by a sack, no text. DIY materials: plaid shirt, jeans, raffia or shredded paper, twine belt, felt patches, optional straw hat.
Best on Gemini: Keeps the face if you forbid the sack mask.
Best on ChatGPT: Loves a bag over the head.
Tip: Put straw only at wrists and pockets.
Towel toga (last-hour)
Edit this photo into a full-body last-minute DIY toga costume try-on. Keep [my face] exactly the same. White bath towel draped as a toga over a white t-shirt, braided belt from a robe tie, indoor hallway, gold paper-leaf headband. Photorealistic, vertical 3:4, five fingers, obvious towel texture, no marble CGI statues, no text. DIY materials: large white towel, safety pins, robe tie, white tee, gold cardstock for a leaf band.
Best on Gemini: Terry-cloth texture sells the joke.
Best on ChatGPT: Turns towels into silk.
Tip: Pin at the shoulder and the waist.
Couples costumes (4)
These do not count toward the twenty solo looks. Upload one photo of each person, or one clear photo of both.
Candlelit vampire pair
Combine these photos into a full-body vampire-couple costume try-on. Keep both faces exactly the same. [Name A] on the left in a black cape, [Name B] on the right in a high-collar dark dress, candlelit dining room, two wine glasses. Photorealistic, vertical 3:4, ten fingers per person, two distinct people, no blended faces, no text.
Best on Gemini: Left/right labels help.
Best on ChatGPT: Faces fuse.
Tip: Generate each person, then ask for a side-by-side.
Classic monster-movie pair
Combine these photos into a full-body classic-monster-movie couple try-on. Keep both faces exactly the same. One person: subtle neck bolts and gray-green makeup. The other: white lace high collar and pale makeup. Foggy laboratory, 1930s lighting. Photorealistic, vertical 3:4. No copyrighted character names, no text.
Best on Gemini: Subtle makeup still looks like you.
Best on ChatGPT: Over-greens skin.
Tip: Say who gets the bolts.
Diner zombie date
Combine these photos into a full-body PG zombie-date costume try-on. Keep both faces exactly the same. Light gray makeup, one small fake scratch each, torn everyday clothes, diner booth at night. Photorealistic, vertical 3:4, no gore, two distinct people, no text.
Best on Gemini: Everyday clothes plus light makeup.
Best on ChatGPT: Adds blood.
Tip: Keep original hair.
Pirate and navigator
Combine these photos into a full-body pirate-and-navigator couple try-on. Keep both faces exactly the same. One weathered navy coat and tricorn. The other: tan coat, rolled map, brass compass prop. Ship deck, golden hour. Photorealistic, vertical 3:4, five fingers each, no firearms, no copyrighted characters, no text.
Best on Gemini: Two distinct coats help.
Best on ChatGPT: Matching outfits appear.
Tip: Assign coats by name, not height.
Group and family costumes (3)
Three to five people. No photorealistic child-face samples. If kids are in the upload, keep themes cute.
Matching pumpkin patch crew
Edit this group photo into a full-body matching pumpkin-patch Halloween costume try-on. Keep every face exactly the same. Three to five people in rust-colored sweaters and small pumpkin pins, farm stand, string lights, smiling, no scary makeup. Photorealistic, vertical 3:4, only the people in the uploaded photo, no extra relatives, no text.
Best on Gemini: Prefer one real group photo.
Best on ChatGPT: Extra people appear.
Tip: Crop to the people you want before you upload.
Office ghost circle (adults)
Edit this group photo into a full-body adult sheet-ghost group try-on. Keep every face recognizable in neat eye holes. Three to five adults, white sheets, living room, fairy lights, smiling, not scary. Photorealistic, vertical 3:4, adult faces only, no extra people, no text.
Best on Gemini: Eye holes need a second pass.
Best on ChatGPT: Same face-lock follow-up.
Tip: Start from a real group photo. Do not invent missing relatives.
DIY robot crew
Edit this group photo into a full-body last-minute DIY robot-crew costume try-on. Keep every face exactly the same. Three to five people in mismatched silver cardboard boxes and foil tape, kitchen or garage, homemade. Photorealistic, vertical 3:4, five fingers each, no extra people, no logos, no text.
Best on Gemini: Mismatched boxes look like friends.
Best on ChatGPT: Uniform movie robots.
Tip: Do not ask the model to invent a missing person.
From the AI preview to real clothes
Use the still as a search brief, not a product page. Crop to the garment. Search plain words: black high-collar cape wine lining, adult inflatable dinosaur costume, pinstripe three-piece suit fedora. Match fabric, not CGI sheen. For DIY looks, compare box size to your torso. Search a retailer you already trust. No affiliate links.
Keep the face (and fix full-body fails)
Keep the face exactly the same. Do not beautify or change the age. Keep my original body proportions, height, and hair. Only change the clothes. Two hands, five fingers each. Remove extra fingers. No melted palms. There are [N] people. Keep separate faces. Left is [A], right is [B]. Do not blend.
If the face still drifts, crop the source tighter on the head, then extend back to full body. If the photo ends at the thighs, re-upload a shot with shoes or add crop at the knees. Mascot suits shrink people: repeat keep original body proportions.
Privacy
Only upload photos you have the right to use. Ask before you run someone else’s picture. For anyone under 18, a parent or guardian should upload, and think twice before posting. This page has no photorealistic child samples.
gptmelo provides copy-paste prompts only. We do not store your photos. Generation happens in Gemini or ChatGPT. Do not put a real name, school, workplace, or home address in a prompt.
FAQ
Are these AI Halloween costume try-on prompts free?
The prompts on this page are free to copy. Gemini and ChatGPT may require a signed-in account or a paid plan. We do not charge you to read or copy the text.
Should I use Gemini or ChatGPT for costume try-on?
Use Gemini (Nano Banana) first for photoreal clothes on a real body. Use ChatGPT Images for a mascot or poster-like costume. Samples here were generated with Gemini as scene examples, not as your selfie.
Why don’t I look like myself in the costume?
The model is inventing a nearby face or a new body. Use a sharp full-body photo, add keep the face exactly the same, and add keep original body proportions. A short correction beats a brand-new prompt.
Can I use the image commercially?
Read Gemini’s and ChatGPT’s image-use terms for your account. Other people’s faces, trademarks, and copyrighted characters are still their rights. These prompts describe generic looks on purpose.
Will the DIY list match the generated photo exactly?
No. The still is a preview. Real foil, bags, and boxes look rougher. Use the image for silhouette and color, then build with what you have.
Do you keep the photos I generate?
No. gptmelo does not run the image model for you in this article and does not store uploads. You generate inside Gemini or ChatGPT.
More AI photo prompts
More collections live in the prompts hub. Atmosphere looks: Halloween AI photo prompts.
If you care about how AI search talks about a brand rather than Halloween costumes, gptmelo’s brand visibility tools are on gptmelo.com.