Paul Edward Valentine Giamatti (born June 6, 1967) is an American actor. Giamatti began his career as a supporting actor in several commercially successful and critically acclaimed films produced during the 1990s including Private Parts, The Truman Show, Saving Private Ryan, The Negotiator, and Man on the Moon, before earning lead roles in several projects in the 2000s including American Splendor, Sideways, Cinderella Man, The Illusionist, John Adams, Cold Souls, and Barney's Version. Description above from the Wikipedia article Paul Giamatti, licensed under CC-BY-SA, full list of contributors on Wikipedia.
| Movie | Downton Abbey: The Grand Finale | Harold Levinson | 2025-09-10 |
| Movie | The Holdovers | Paul Hunham | 2023-10-27 |
| Movie | Spider-Man: All Roads Lead to No Way Home | Self (archive footage) | 2022-05-03 |
| Movie | Gunpowder Milkshake | Nathan | 2021-07-14 |
| Movie | A Mouthful of Air | Dr. Sylvester | 2021-10-29 |
| Movie | Jungle Cruise | Nilo | 2021-07-28 |
| Series | 30 Coins | Christian Barbrow | 2020-11-29 |
| Movie | Wax Paul Now | Self | 2019-11-12 |
| Movie | Private Life | Richard Grimes | 2018-10-05 |
| Movie | The Catcher Was a Spy | Sam Goudsmit | 2018-06-22 |
| Movie | White Fang | Beauty Smith | 2018-03-28 |
| Movie | I Think We're Alone Now | Patrick | 2018-09-14 |
| Movie | Jim & Andy: The Great Beyond | Self | 2017-09-05 |
| Series | Billions | Charles 'Chuck' Rhoades Jr. | 2016-01-17 |
| Movie | Ratchet & Clank | Chairman Drek (voice) | 2016-04-13 |
| Movie | Morgan | Dr. Alan Shapiro | 2016-09-01 |
| Movie | The Phenom | Dr. Mobley | 2016-06-24 |
| Movie | San Andreas | Dr. Lawrence Hayes | 2015-05-27 |
| Movie | Giant Sloth | Gordon Boonewell | 2015-01-20 |
| Movie | Goldfish | Goldfish (voice) | 2015-04-12 |
| Movie | Love & Mercy | Dr. Eugene Landy | 2015-05-29 |
| Movie | April and the Extraordinary World | Pizoni (English DUB) | 2015-11-04 |
| Movie | Madame Bovary | Monsieur Homais | 2015-06-04 |
| Movie | Straight Outta Compton | Jerry Heller | 2015-08-11 |
| Movie | The Little Prince | The Academy Teacher (voice) | 2015-07-29 |
| Movie | Hoke | Hoke Mosely | 2014-01-01 |
| Movie | River of Fundament | Ptah-Nem-Hotep | 2014-02-12 |
| Series | The Roosevelts: An Intimate History | Theodore Roosevelt (voice) | 2014-09-14 |
| Movie | The Amazing Spider-Man 2 | Aleksei Sytsevich | 2014-04-16 |
| Movie | Turbo | Chet (voice) | 2013-07-11 |
| Movie | The Congress | Dr. Barker | 2013-07-03 |
| Movie | John Dies at the End | Arnie Blondestone | 2013-01-25 |
| Movie | All Is Bright | Dennis Girard | 2013-09-10 |
| Movie | Love, Marilyn | Self | 2013-05-30 |
| Movie | Romeo & Juliet | Friar Laurence | 2013-09-12 |
| Movie | Wolfpack Only: The Hangover Retrospective | Self | 2013-12-03 |
| Movie | Saving Mr. Banks | Ralph | 2013-11-29 |
| Movie | 12 Years a Slave | Theophilus Freeman | 2013-10-18 |
| Movie | Parkland | Abraham Zapruder | 2013-10-02 |
| Movie | Cosmopolis | Benno Levin | 2012-05-25 |
| Movie | Citizens of Cosmopolis | Self | 2012-09-25 |
| Movie | Rock of Ages | Paul Gill | 2012-06-13 |
| Movie | Win Win | Mike Flaherty | 2011-03-18 |
| Movie | Ironclad | King John | 2011-03-03 |
| Movie | The Hangover Part II | Kingsley | 2011-05-25 |
| Series | Prohibition | Reader / George Remus (voice) | 2011-10-02 |
| Movie | Too Big to Fail | Ben Bernanke | 2011-11-25 |
| Movie | The Ides of March | Tom Duffy | 2011-10-07 |
| Movie | Barney's Version | Barney Panofsky | 2010-10-26 |
| Movie | Saturday Night Live: The Best of Amy Poehler | Uncle Chaz (archive footage) | 2009-04-18 |
| Movie | Duplicity | Richard Garsik | 2009-03-18 |
| Movie | Cold Souls | Paul | 2009-08-07 |
| Movie | The Last Station | Vladimir Chertkov | 2009-09-04 |
| Movie | The Haunted World of El Superbeasto | Dr. Satan (voice) | 2009-09-12 |
| Series | John Adams | John Adams | 2008-03-16 |
| Movie | Pretty Bird | Rick Honeycutt | 2008-08-08 |
| Movie | The Hawk Is Dying | Georges Gattling | 2007-03-30 |
| Movie | Shoot 'Em Up | Hertz | 2007-07-26 |
| Movie | Trumbo | Self | 2007-09-10 |
| Movie | The Nanny Diaries | Mr. X | 2007-08-24 |
| Movie | Fred Claus | Nick (Santa) Claus | 2007-11-09 |
| Movie | Lady in the Water | Cleveland Heep | 2006-07-19 |
| Movie | Asterix and the Vikings | Asterix (Voice / English Version) | 2006-04-12 |
| Series | Amazing Screw-On Head | Screw-On Head (voice) | 2006-07-27 |
| Movie | The Ant Bully | Stan Beals (voice) | 2006-07-28 |
| Movie | The Amazing Screw-On Head | Screw-On Head (voice) | 2006-08-20 |
| Movie | The Illusionist | Inspector Uhl | 2006-08-18 |
| Movie | Robots | Tim the Gate Guard (voice) | 2005-03-10 |
| Movie | Cinderella Man | Joe Gould | 2005-06-02 |
| Movie | Sideways | Miles | 2004-10-22 |
| Movie | The Pentagon Papers | Anthony Russo | 2003-03-09 |
| Movie | Confidence | Gordo | 2003-04-25 |
| Movie | Paycheck | Shorty | 2003-12-25 |
| Movie | American Splendor | Harvey Pekar | 2003-08-15 |
| Movie | Big Fat Liar | Marty Wolf | 2002-02-08 |
| Movie | Thunderpants | Johnson J. Johnson | 2002-05-24 |
| Movie | Planet of the Apes | Limbo | 2001-07-26 |
| Movie | Storytelling | Toby Oxman | 2001-11-08 |
| Movie | If These Walls Could Talk 2 | Ted Hedley | 2000-03-05 |
| Movie | Big Momma's House | John | 2000-05-31 |
| Movie | Duets | Todd Woods | 2000-09-09 |
| Movie | Cradle Will Rock | Carlo | 1999-12-10 |
| Movie | Man on the Moon | Bob Zmuda | 1999-12-22 |
| Movie | Doctor Dolittle | Blaine (uncredited) | 1998-06-26 |
| Movie | The Truman Show | Simeon | 1998-06-04 |
| Movie | Saving Private Ryan | Sergeant Hill | 1998-07-24 |
| Movie | Tourist Trap | Jeremiah Piper | 1998-04-05 |
| Movie | The Negotiator | Rudy | 1998-07-29 |
| Movie | Winchell | Herman Klurfeld | 1998-11-21 |
| Movie | Safe Men | Veal Chop | 1998-08-07 |
| Movie | A Further Gesture | Hotel Clerk | 1997-01-01 |
| Movie | Donnie Brasco | FBI Technician | 1997-02-27 |
| Movie | Arresting Gena | Detective Wilson | 1997-01-27 |
| Movie | Deconstructing Harry | Professor Abbott | 1997-12-12 |
| Movie | My Best Friend's Wedding | Bellman | 1997-06-19 |
| Movie | Private Parts | Kenny | 1997-03-07 |
| Movie | Before and After | Courtroom Audience (uncredited) | 1996-02-23 |
| Movie | Breathing Room | George | 1996-11-08 |
| Movie | Mighty Aphrodite | Extras Guild Researcher | 1995-09-13 |
| Movie | Sabrina | Scott | 1995-12-15 |
| Movie | Past Midnight | Larry Canipe | 1992-05-03 |
| Movie | Singles | Kissing Man | 1992-09-18 |
| Movie | She'll Take Romance | Heckler #2 | 1990-11-25 |