Paul Edward Valentine Giamatti (/ˌdʒiːəˈmɑːti/; born June 6, 1967) is an American actor and producer. He first garnered attention for his breakout role in Private Parts (1997) as Kenny "Pig Vomit" Rushton, which led to him playing more supporting roles such as Sergeant Hill in Saving Private Ryan (1998), Bob Zmuda in Man on the Moon (1999), John Maxwell in Big Momma's House (2000), and Marty Wolf in Big Fat Liar (2002).
He won acclaim for his leading roles as Harvey Pekar in American Splendor (2003), Miles Raymond in Sideways (2004) and Mike Flaherty in Win Win (2011) while continuing to play supporting roles, like Joe Gould in Cinderella Man (2005), which earned him a nomination for the Academy Award for Best Supporting Actor, Chief Inspector Uhl in The Illusionist (2006), Karl Hertz in Shoot 'Em Up (2007), Nicholas "Nick" Claus in Fred Claus (2007), Tom Duffy in The Ides of March (2011), Theophilus Freeman in 12 Years a Slave (2013), Ralph in Saving Mr. Banks (2013), Eugene Landy in Love & Mercy (2014), Dr. Lawrence Hayes in San Andreas (2015) and Jerry Heller in Straight Outta Compton (2015).