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Documentation Index

Fetch the complete documentation index at: https://help.mirage.app/llms.txt

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On Captions desktop, Actors is where you browse public and private actors and create new ones for prompt-to-video and other avatar projects.

Open the Actors library

Click Actors in the left sidebar to open the Actors page. The Actors library lists public actors (available to everyone) and private actors (actors you created, visible only to you).
Actors page in the Captions desktop sidebar showing the Actors library

Create an actor

Click Create actor. You can start in one of two ways:
  • Upload a reference image
  • Write a prompt that describes the actor
Create actor options for a reference image or a text prompt

Create an actor from a reference image

Use a reference photo that shows:
  • The face clearly
  • The mouth open with teeth visible
  • A mid or close-up shot
  • Only one person in the frame
  • A subject whose gender matches the speaker voice you plan to use
Reference image requirements for creating an actor from a photo
After you upload the image, you can zoom in if you want the framing closer to the actor’s face.
Zooming in on a reference image before actor generation
By uploading an image, you confirm that you have the rights, consents, and licenses needed to use it.
Confirming rights before Captions generates actor sample looks
Captions then generates a few sample looks for the actor.
Sample looks generated for an actor from a reference image
To try another variation, click New look. In the prompt field, describe the changes you want. You can also upload images of objects or other references to guide the new look. Creating new looks uses credits.
New look prompt and reference uploads for an actor
When you have the look you want, save it to your Actors library.
Saving an actor look to the Actors library
To review actors you generated earlier, click History.
History of previously generated actors

Create an actor from a prompt

Click Create actor, then choose Describe your actor.
Describe your actor option when creating an actor from a prompt
Describe the person you want in one flowing scene description. Include appearance details such as gender, age, hair, clothing, and accessories, how they face the camera, and the setting or lighting you want. Match the actor to the voice you plan to use. For a full prompt guide with examples, see the Mirage prompt guide.
Actor prompt field with optional random prompt from the dice icon
Click the dice icon if you want Captions to fill in a random actor prompt.After you submit the prompt, Captions generates two actor options. Pick the one that looks best to create the actor. If neither option works, edit the prompt and generate again.
Choosing one of two generated actors after submitting a prompt
Last modified on May 18, 2026