Patrick Galen Dempsey (b. January 13, 1966) is an American actor. He is best known for his work on the television series "Grey's Anatomy" as Doctor Derek Shepherd. He has won a Screen Actors Guild Award as a cast member of "Grey's Anatomy". He has also been nominated for the Emmy and Golden Globe Awards. He has been in the many movies. These include "", "Valentine's Day", "Sweet Home Alabama", "Brother Bear 2" and "Enchanted".