Paul Edward Valentine Giamatti is an American actor and film producer. He first garnered attention for his breakout role in Private Parts as Kenny "Pig Vomit" Rushton, leading to supporting roles in Saving Private Ryan, Man on the Moon, Big Momma's House, and Big Fat Liar. He won acclaim for his leading roles as Harvey Pekar in American Splendor (2003), Miles Raymond in Sideways (2004), Mike Flaherty in Win Win (2011), and Richard in Private Life (2018), while continuing to play supporting roles such as 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). He played the titular character in the HBO miniseries John Adams (2008), which earned him a Golden Globe Award, a Primetime Emmy Award and Screen Actors Guild Award. He stars as U.S. Attorney Chuck Rhoades Jr. in the Showtime television series Billions (2016–present).