Ice Age is an American media franchise centering on a group of mammals surviving the Paleolithic ice age. It consists of computer-animated films, short films, TV specials and a series of video games. The first five films were produced by Blue Sky Studios. The series features the voices of Ray Romano, John Leguizamo, Denis Leary and Chris Wedge, who were the only constant cast members for the original films. Five theatrical films have been released in the series thus far: Ice Age in 2002, Ice Age: The Meltdown in 2006, Ice Age: Dawn of the Dinosaurs in 2009, Ice Age: Continental Drift in 2012, and Ice Age: Collision Course in 2016. As of April 2016, the franchise had generated $6 billion in revenue,[2] making it one of the highest-grossing media franchises of all time.