Everyone knows who Chris Hemsworth is. Not only does the actor play Thor, but he was just named People's Sexiest Man Alive. Woody Harrelson, however, didn't realize that his "Hunger Games" co-star Liam Hemsworth was the "Thor" star's brother. In an interview for "The Hunger Games: Catching Fire" from last year that's been making the rounds again, Harrelson has the major realization that the Hemsworth brothers are related.