Matt Damon (54) proved his smarts on the US version of the quiz show 'Who Wants to Be a Millionaire?'. Together with TV host ...

Matt Damon faces off with Jimmy Kimmel on 'Millionaire,' teaming with Ken Jennings in a trivia showdown that turns into something unforgettable.

As Jennings quickly deduced the answer to the final question that would earn him and Damon the million-dollar top-prize for ...