Runway Act-Two

Overview

Animate a character with a reference video.

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Quick facts

• Modes: Image + Video → Video (Character Performance)

• Default clip length / output size: Matches reference video

• Aspect ratios: 21:9, 16:9, 1:1, 4:3, 3:4

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What it's great for

• Animating static character portraits with realistic facial expressions

• Transferring performance from one video to a different character

• Creating character animations without manual rigging

• Body language and gesture transfer

• Expressive character performances for storytelling

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Parameters

Control	Type	Default	Notes
Character Image	Upload	—	Still image of character to animate (required)
Reference Video	Upload	—	Performance video with facial expressions and body movements (required)
Body Control	Toggle	On	Applies bodily gestures in addition to facial expressions
Expressiveness	Slider	3	Controls intensity of facial expressions (1–5)
Seed	Number	Random	Optional for repeatable results

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Modes

Mode	Estimated time	Required inputs	Typical use
Image + Video → Video	~60s	Character Image, Performance Video	Animate character with reference performance

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Output options

Option	Values / notes
Duration	Matches reference video length
Aspect ratio	Matches reference video aspect ratio
Resolution	832×1104 (portrait) to 1584×672 (wide) depending on aspect ratio
Notes	Text and image moderation applied

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Prompt tips

• No text prompts needed—purely image + video input based

• Choose reference videos with clear, well-lit facial expressions

• Enable Body Control for full-body performance transfer

• Use higher Expressiveness (4-5) for exaggerated/cartoon performances

• Use lower Expressiveness (1-2) for subtle, realistic performances

• Character image aspect ratio should be between 0.5 and 2.0 (width/height)

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Safety

Text and image moderation are applied. Public figure protection is enabled at "low" threshold by default. Content must comply with Runway's Usage Policy.

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