Sam Rockwell is an American actor 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), Choke (2008), Moon (2009) and Seven Psychopaths (2012), as well as for his supporting roles in The Green Mile (1999), Galaxy Quest (1999), The Assassination of Jesse James by Coward Robert Ford (2007), Frost/Nixon (2008), Conviction (2010), Iron Man 2 (2010), Cowboys and Aliens (2011) and The Way, Way Back (2013). His 2018 release includes the drama film Three Billboards Outside Ebbing, Missouri, which tells the story of a bereaved mother's quest for justice for her murdered daughter.