Tour of Duty: As U.S. Army officer Roy Miller in this year's action-drama Green Zone, Matt Damon proves he was born to make combat fatigues steam.
Why We Love Him: He's got athletically good looks, a Harvard pedigree (well, he dropped out, but does it matter?) and an Oscar (scooped up for best screenplay for the 1997 feel-good drama Good Will Hunting). This father of two daughters is also famously funny, as his star turn on Will & Grace proved in spades. Up next, Damon's guest starring on 30 Rock as Liz Lemon's love interest -- and who doesn't love a hunk with a great sense of humor?