Sam Rockwell (born November 5, 1968) is an American actor. He became well known for his leading roles in Lawn Dogs (1997), Confessions of a Dangerous Mind (2002), Matchstick Men (2003), The Hitchhiker's Guide to the Galaxy (2005), Moon (2009), and Seven Psychopaths (2012). He has also played supporting roles in The Green Mile (1999), Galaxy Quest (1999), Frost/Nixon (2008), Iron Man 2 (2010), Conviction (2010), and The Way, Way Back (2013).