Blog · October 6, 2026

AI actors for ads: using fictional creators well

An AI actor is a generated person who appears in your ad: they hold the product, use it and talk to camera, without anyone being filmed. Used well, they let you test ideas and settings at a pace no shoot can match. Used carelessly, they mislead viewers and look uncanny. This guide covers casting, consistency, voice and the lines not to cross.

Two kinds of AI actor

• Avatar presenters are a talking head, usually from the chest up against a plain or office background, reading a script. They suit explainers and announcements.
• Generated actors in a scene act: they pick up your product, use it and react, in a kitchen, a car or a shop, filmed as if on a phone. They suit product ads, and especially the UGC format described in AI UGC ads.

Three generated actors in their scenes. None of them exists; each is now a character in our library, as Jordan, Lena and Theo.

What they're good for

• Testing. Try the same ad with different people, settings and lines, and find out which version works before paying for a shoot.
• Range. Show the product with people of different ages and styles, in the places your different customers actually use it.
• Speed. A new ad in minutes, not weeks of booking, shipping and revisions.

What they're not for is proof. An AI actor hasn't used your product, so they can't give a testimonial, show results or vouch for anything.

Casting an AI actor

Cast the way you would for a real shoot. Start with who actually buys the product, then decide:

• Age and style that match your customer, not a generic model.
• Wardrobe that fits the scene and the brand: gym clothes for a gym, a coat for a cold street.
• A realistic face. Natural skin, ordinary features, no airbrushed perfection. The more "AI beautiful" a face is, the faster viewers notice.
• One actor or many. Keeping one face across a product line builds familiarity; using several lets you test who your audience responds to.

Keeping them consistent

The most common failure with AI actors is drift: the face, hair or outfit changes slightly between moments, or between ads. The fix is a proper reference. A single portrait isn't enough, because it doesn't show the model what the person looks like from the side or full length. A character sheet with the same person from several angles, in one outfit, holds them steady.

For a different outfit, make a new look from the same face rather than describing new clothes in the prompt. Then compare the last second of each video with the first. Keeping products and faces consistent shows a character sheet made from a single frame. More on avoiding the tell-tale signs in how to make an AI video that looks real.

Giving them a voice

Choose a voice that fits the person and the product, and keep it the same everywhere that actor appears. Only use a voice you have permission to use: a stock voice, your own, or someone who has agreed to it. Never imitate a recognisable voice. Then write the exact words they say and keep them short; the UGC ad script template shows how many words fit.

Directing the performance

Describe the performance as you'd describe it to an actor: relaxed or excited, when they look into the lens, when they smile. One clear action per stretch of time works better than a list of gestures. Avoid exaggerated reactions: a slight smile and a nod read as more real than wide eyes and a gasp.

Lines not to cross

• No look-alikes. Don't create actors who resemble real celebrities, creators or anyone else who hasn't agreed.
• No photos without consent. If you build an actor from photos of a real person, they must have agreed to it, including use in ads.
• No fake testimonials. An AI actor doesn't say "I've been using this for months" or describe results.
• No fake experts. Don't dress an AI actor as a doctor, dentist or trainer recommending your product. Viewers read it as professional advice from a real person.
• Disclose it. Label the ad as AI-generated.

AI actors in fairytale video

fairytale video has a library of fictional creators you can use as they are, including the 13 from the reels on our home page. You can also generate a new character from a description, or upload photos of a person who has agreed to it. Each character gets a sheet with six views: front, left and right head-and-shoulders, and full-length front, back and three-quarter views. The sheet gives the video model identity and wardrobe references; compare each result against it. Each sheet or new look drawn with GPT Image 2.5 costs 5 credits. You can use up to five clothing photos for a new look; review the face and outfit before generating a video. Choose a voice from the library, or record or upload one you have permission to use. For the whole studio, see what is fairytale video.