Ice Age is a 2002 American animated adventure comedy film produced by Blue Sky Studios and distributed by 20th Century Fox. The film was directed by Chris Wedge (in his feature directorial debut) and co-directed by Carlos Saldanha from a screenplay by Michael Berg, Michael J. Wilson, and Peter Ackerman, based on a story by Wilson. It features the voices of Ray Romano, John Leguizamo, Denis Leary, Goran Višnjić, and Jack Black. Set during the days of the Pleistocene ice age, the film centers around three main characters—Manny (Romano), a no-nonsense woolly mammoth; Sid (Leguizamo), a loudmouthed ground sloth; and Diego (Leary), a sardonic saber-toothed tiger—who come across a human baby and work together to return it to its tribe. Additionally, the film occasionally follows Scrat, a speechless "saber-toothed squirrel" (Wedge), who is perpetually searching for a place in the ground to bury his acorn.

Ice Age was originally intended as a 2D animated film developed by Fox Animation Studios, but eventually became the first full-length animated film for the newly reformed Blue Sky, which had been reshaped from a VFX house to a computer animation studio. Focus shifted from making an action-adventure drama film to a more comedy-oriented one, and several writers, such as Berg and Ackerman, were brought on to bring out a wittier tone.

The film was released in the United States on March 15, 2002. It received mostly positive reviews from critics and was nominated at the 75th Academy Awards for Best Animated Feature. It was a box office success and grossed over $383.2 million, making it the eighth highest-grossing film of 2002 and the highest-grossing animated film of 2002. It started the Ice Age franchise, being followed by four sequels: Ice Age: The Meltdown (2006), Ice Age: Dawn of the Dinosaurs (2009), Ice Age: Continental Drift (2012), and Ice Age: Collision Course (2016).

A sixth installment, The Ice Age Adventures of Buck Wild, was produced by Walt Disney Pictures without the involvement of Blue Sky Studios and released as a direct-to-streaming film on Disney+ in 2022. Two holiday specials were released: 2011's Ice Age: A Mammoth Christmas (taking place between Dawn of the Dinosaurs and Continental Drift) and 2016's Ice Age: The Great Egg-Scapade (taking place between Continental Drift and Collision Course). Several Ice Age short films were released between 2002 and 2022.