Matt Damon On Gaining Weight For 'The Informant!': 'It Was Really, Really... Really Fun'

I saw "The Informant!" last night. It was quite good. Matt Damon has really distinguished himself as an actor who inhabits the roles that he plays; his pudgy corporate whistle-blower Mark Whitacre is only the latest in a long line.

When MTV's Josh Horowitz spoke with Damon last week at the Toronto International Film Festival, he asked the actor about how he prepared for his meaty role. As in how he gained all that weight; no fat suits for this guy. Said Damon, "it was really, really... really fun" to put on that weight. I'll bet. Hear the actor run through his "Informant!" diet in the Rough Cut clip below.

Are you seeing "The Informant!" this weekend?