Lightyear is an upcoming American computer-animated science fiction action-adventure film produced by Pixar Animation Studios and Walt Disney Pictures, and distributed by Walt Disney Studios Motion Pictures. It is a spin-off of the Toy Story film series, serving as an origin story for the fictional test pilot/astronaut who the Buzz Lightyear toy featured in the previous films was inspired by the action figure of the same name, presented as a film within a film the characters in Toy Story would watch.

This concept of film within a film was previously adapted as the 2000 direct-to-video film Buzz Lightyear of Star Command: The Adventure Begins that would become the pilot movie of a spin-off television series Buzz Lightyear of Star Command (2000–2001). The film was written and directed by Angus MacLane and stars Chris Evans as the voice of the title character, with Keke Palmer, Dale Soules, Taika Waititi, Peter Sohn, Uzo Aduba, James Brolin, Mary McDonald-Lewis, Efren Ramirez and Isiah Whitlock Jr. in supporting roles.