Inside Out is a 2015 American animated coming-of-age film produced by Pixar Animation Studios for Walt Disney Pictures. It was directed by Pete Docter from a screenplay he co-wrote with Meg LeFauve and Josh Cooley. The film stars the voices of Amy Poehler, Phyllis Smith, Richard Kind, Bill Hader, Lewis Black, Mindy Kaling, Kaitlyn Dias, Diane Lane, and Kyle MacLachlan. Inside Out follows the inner workings of the mind of Riley, a young girl who adapts to her family's relocation as five personified emotions administer her thoughts and actions.

Docter conceived Inside Out in October 2009 after observing changes in his daughter's personality as she grew older. The project was subsequently green-lit, and Docter and co-director Ronnie del Carmen developed the story, while consulting psychologists and neuroscientists in an effort to accurately portray the mind. Development took five and a half years on a budget of approximately $175 million. Significant changes to the film's story and characters delayed the film's production schedule.

Inside Out debuted at the 68th Cannes Film Festival on May 18, 2015, and was released in the United States on June 19. It received positive reviews from critics for its craftsmanship, screenplay, subject matter, plot, and vocal performances—particularly those of Poehler, Smith, Kind, Hader, Kaling, and Black. The National Board of Review and the American Film Institute named Inside Out one of the top-ten films of 2015. It grossed $858.8 million worldwide, finishing its theatrical run as the seventh-highest-grossing film of 2015. The film was nominated for two awards at the 88th Academy Awards, winning Best Animated Feature, and received numerous other accolades. Philosophical journal Film and Philosophy recognized Inside Out as one of the best animated films ever made. A sequel, Inside Out 2, was released in 2024.