Let's make this birthday one to remember.

55 years old (Born on February 28, 1969)

American actor; He is famous from House, M.D..

Grew up on the same block as actor Casper Van Dien. They raced each other in go-carts. Is very good friends with "House M.D." (2004) co-star Hugh Laurie. Attended the Columbia University school of General Studies and Continuing Education. He co-founded a theater company called Malaparte with Ethan Hawke, Frank Whaley, and Steve Zahn. Received the 2001 Tony Award as Best Actor (Featured Role - Play) for his portrayal as A.E. Housman in Tom Stoppard's "The Invention of Love." Nominated in the same category two other times: in 1993, for a revival of George Bernard Shaw's "Candida," and in 2003 for a revival of "Long Day's Journey into Night" by Eugene O'Neill.

Took his brother's first name (Sean) as his middle name.

To this day, is still close with Dead Poets Society (1989) co-star Ethan Hawke.