Transformers One is an upcoming American animated science fiction film based on the Transformers toyline by Hasbro. Serving as the eighth installment in the Transformers film series, the film is directed by Josh Cooley from a screenplay by Andrew Barrer, Gabriel Ferrari, and Steve Desmond. The ensemble voice cast includes Chris Hemsworth, Brian Tyree Henry, Scarlett Johansson, Keegan-Michael Key, Jon Hamm, and Laurence Fishburne. The film is described as an "origin story" set on the planet Cybertron and will center on the relationship between Optimus Prime and Megatron.

In March 2015, following the release of Transformers: Age of Extinction (2014), Paramount Pictures tasked Akiva Goldsman with working with Michael Bay, Steven Spielberg, and Lorenzo di Bonaventura to set up a writer's room to create ideas for potential future Transformers films. By May, Barrer and Ferrari had joined the writer's room, and one of the ideas that came from there was an animated prequel that would be set on Cybertron. The film was announced in August 2017, and by April 2020, Cooley had been hired to direct. The title and voice cast were revealed in April 2023, while Industrial Light & Magic provided animation.

Transformers One is scheduled to be theatrically released in the United States on September 13, 2024, by Paramount Pictures. It is planned to be the first in a potential trilogy.