Denis Leary, the voice of the saber-toothed tiger Diego from Ice Age and its sequel Ice Age: The Meltdown talks to MTV News about the upcoming third film in Fox’s animated franchise. The actor is not sure about the storyline of the film which, according to him, doesn’t really matter. Second film in the franchise, Ice Age:The Meltdown hit the screen in 2006 and turned out to be a big moneyspinner, grossing over $600 million worldwide.