Ice Age: Dawn of the Dinosaurs is a 2009 American animated adventure comedy film produced by Blue Sky Studios and distributed by 20th Century Fox. It is the sequel to Ice Age: The Meltdown (2006) and the third installment in the Ice Age film series. It was directed by Carlos Saldanha and co-directed by Mike Thurmeier, from a screenplay written by Michael Berg, Peter Ackerman, Mike Reiss, and Yoni Brenner, based on a story conceived by Jason Carter Eaton. Ray Romano, John Leguizamo, Denis Leary, and Chris Wedge reprise their roles from the first two films and Seann William Scott, Josh Peck, and Queen Latifah reprise their roles from The Meltdown, with Simon Pegg joining them in the role of a weasel named Buck. In the film, while Manny and Ellie are preparing for their baby, Sid the Sloth is kidnapped by a female Tyrannosaurus after stealing her eggs, leading the rest of the herd to rescue him in a tropical lost world inhabited by dinosaurs underneath the ice.

The film was released on July 1, 2009, becoming the first Ice Age film and the first 20th Century Fox film to be released in 3D. It received mixed reviews from critics, and has grossed $886.7 million worldwide, making it the third-highest-grossing film of 2009, the highest-grossing animated film of 2009, the highest-grossing Ice Age film and the highest-grossing film from Blue Sky Studios. Two sequels, Ice Age: Continental Drift and Ice Age: Collision Course, were released in 2012 and 2016, respectively.