Transformers One is a 2024 American animated science fiction action film based on Hasbro's Transformers toy line. It was directed by Josh Cooley from a screenplay by Eric Pearson, Andrew Barrer and Gabriel Ferrari, the latter two of whom also conceived the film's story. The film features the voices of Chris Hemsworth, Brian Tyree Henry, Scarlett Johansson, Keegan-Michael Key, Steve Buscemi, Laurence Fishburne, and Jon Hamm. It is set on Cybertron, the home planet of the Transformers, and depicts the origins and early relationship of Optimus Prime and Megatron.