Runway offers Act-One and Act-Two, AI tools that transfer a human actor's facial expressions, mouth movements, and gestures from a simple driving video onto a generated or user-supplied character image. These tools are available to users on Standard plan and higher.

Act-One was launched in October 2024 as part of the Gen-3 Alpha platform. It takes a short video of a person performing as input — recorded on any consumer camera — and maps that performance onto a still character image or video, generating an animated clip. Act-Two, the successor, extends this capability to include body gestures and environmental motion. Runway describes the prior industry approach as requiring 'complex, multi-step workflows' including motion capture equipment, multiple footage references, and manual face rigging — but does not explicitly confirm that Runway itself previously employed such a process for its own users.