Matt Damon channels Matthew McConaughey for Letterman: The sequel

Matt Damon is going to the Academy Awards this weekend, but it sounds like he's not too worked up about winning.

"I don't have a chance in hell," he jokes with David Letterman on Friday's (March 5) "Late Show" in the clip above.

Ah, but if he does win for best supporting actor in "Invictus"?