Oliver Platt was born in Windsor, Ontario, to American parents, Sheila Maynard, a social worker, and Nicholas Platt, a career diplomat. His parents were both from upper-class families, and his maternal great-grandmother, Cynthia Roche, was the sister of Princess Diana's maternal grandfather, Maurice Roche. Platt spent his childhood in Washington DC...
Nominated for 1 Golden Globe. Another 2 wins & 15 nominations.
| Movie | The Ticket | Unknown | 2016 |
| Movie | Shut In | Unknown | 2016 |
| Movie | The Master Cleanse | Unknown | 2016 |
| Movie | Emperor | Unknown | 2016 |
| Movie | The 9th Life of Louis Drax | None | 2016-03-08 |
| Series | Chicago Fire | Unknown | 2016-03-06 |
| Movie | Untitled Warren Beatty Project | Unknown | 2016-03-06 |
| Movie | Bessie | Unknown | 2015 |
| Movie | The Pilgrims | Unknown | 2015 |
| Movie | Frank and Cindy | Unknown | 2015 |
| Series | Chicago Med | Unknown | 2015 |
| Movie | One More Time | Unknown | 2015 |
| Movie | Cut Bank | Unknown | 2015-04-03 |
| Series | Chicago P.D. | Unknown | 2014-01-08 |
| Series | Late Night with Seth Meyers | Unknown | 2014 |
| Series | Fargo | Stavros Milos | 2014-04-15 |
| Movie | Kill the Messenger | Unknown | 2014-10-09 |
| Movie | Chef | Unknown | 2014 |
| Movie | A Merry Friggin' Christmas | Hobo Santa | 2014-11-22 |
| Movie | The Tale of the Princess Kaguya | Lord Minster of the Right Abe | 2013-11-23 |
| Movie | Gods Behaving Badly | Unknown | 2013 |
| Movie | The 67th Annual Tony Awards | Unknown | 2013 |
| Series | The Big C | Unknown | 2013 |
| Series | Sofia the First | Unknown | 2013-01-11 |
| Movie | Legends of Oz: Dorothy's Return | Unknown | 2013 |
| Movie | Lucky Them | Unknown | 2013 |
| Movie | Letters to Jackie: Remembering President Kennedy | Unknown | 2013 |
| Movie | The Oranges | Unknown | 2012-10-05 |
| Movie | Ginger & Rosa | Unknown | 2012-10-19 |
| Movie | Chinese Zodiac | Unknown | 2012 |
| Movie | Love, Marilyn | Unknown | 2012 |
| Series | The Jeff Probst Show | Unknown | 2012-09-10 |
| Series | Prohibition | Unknown | 2011 |
| Series | Talk Stoop with Cat Greenleaf | Unknown | 2011 |
| Movie | X-Men: First Class | Unknown | 2011-06-03 |
| Movie | The BAFTA Britannia Awards | Unknown | 2011-11-07 |
| Series | Prophets of Science Fiction | Unknown | 2011 |
| Movie | Jake and Amir: Fired | Unknown | 2011 |
| Movie | Roland Emmerich: Master of the Modern Epic | Unknown | 2010 |
| Movie | Please Give | Unknown | 2010 |
| Movie | Letters to Juliet | Unknown | 2010 |
| Series | Bored to Death | Unknown | 2010 |
| Movie | AMC News Special: 10 Stories of Sundance | Himself | 2010-01-29 |
| Movie | Love & Other Drugs | Unknown | 2010 |
| Series | The Good Wife | Unknown | 2009-09-22 |
| Movie | The 63rd Annual Tony Awards | Unknown | 2009-06-07 |
| Movie | Frost/Nixon | Unknown | 2009-01-23 |
| Series | Modern Family | Unknown | 2009-09-23 |
| Series | Late Night with Jimmy Fallon | Unknown | 2009-03-02 |
| Movie | 2012 | Carl Anheuser | 2009-11-13 |
| Movie | Wonder Woman | Unknown | 2009 |
| Movie | Year One | Unknown | 2009 |
| Movie | The Making of Frost/Nixon | Unknown | 2009 |
| Movie | The Ten | Unknown | 2008-08-21 |
| Series | The Bronx Is Burning | George Steinbrenner | 2007-07-01 |
| Movie | Martian Child | Unknown | 2007-11-02 |
| Movie | The Thick of It | Unknown | 2007 |
| Movie | The 58th Annual Primetime Emmy Awards | Unknown | 2006-08-27 |
| Movie | 51st Annual Drama Desk Awards | Unknown | 2006 |
| Movie | Scarface: The World Is Yours | Unknown | 2006-10-01 |
| Movie | The Ice Harvest: Beneath the Harvest | Unknown | 2006 |
| Movie | The 60th Annual Tony Awards | Unknown | 2006-06-11 |
| Movie | Loverboy | Unknown | 2005 |
| Movie | Kinsey | Herman Wells | 2005-01-07 |
| Movie | The 62nd Annual Golden Globe Awards | Unknown | 2005-01-16 |
| Movie | The Ice Harvest | Unknown | 2005 |
| Movie | Casanova | Unknown | 2005 |
| Series | Huff | Russell Tupper | 2004-11-07 |
| Movie | 'Huff': Around the Edges | Unknown | 2004 |
| Movie | All the Pieces Together | Unknown | 2004 |
| Movie | Pieces of April | Unknown | 2003 |
| Series | Queens Supreme | Unknown | 2003 |
| Movie | Hope Springs | Unknown | 2003 |
| Series | Nip/Tuck | Unknown | 2003-07-22 |
| Series | Jimmy Kimmel Live! | Unknown | 2003-01-26 |
| Series | Ellen: The Ellen DeGeneres Show | Unknown | 2003-09-08 |
| Movie | Liberty Stands Still | Unknown | 2002 |
| Movie | Zig Zag | Unknown | 2002 |
| Movie | Ash Wednesday | Unknown | 2002 |
| Movie | Don't Say a Word | Unknown | 2001-09-28 |
| Series | Dinner for Five | Unknown | 2001-07-07 |
| Series | Deadline | Unknown | 2001 |
| Movie | SSX Tricky | Luther-Dwayne Grady | 2001-11-06 |
| Movie | Gun Shy | Unknown | 2000 |
| Movie | Ready to Rumble | Jimmy King | 2000-04-07 |
| Movie | 2000 MTV Movie Awards | Unknown | 2000-08-01 |
| Series | The Late Late Show with Craig Kilborn | Unknown | 1999-03-31 |
| Movie | Lake Placid | Hector Cyr | 1999-07-16 |
| Movie | Bicentennial Man | Rupert Burns | 1999-12-17 |
| Movie | Cinderelmo | Unknown | 1999 |
| Movie | Three to Tango | Unknown | 1999 |
| Series | The West Wing | Unknown | 1999-09-22 |
| Movie | Bulworth | Unknown | 1998-05-22 |
| Movie | Dangerous Beauty | Maffio Venier | 1998-02-20 |
| Movie | The Impostors | Unknown | 1998 |
| Movie | Doctor Dolittle | Unknown | 1998 |
| Movie | Simon Birch | Unknown | 1998 |
| Series | The Rosie O'Donnell Show | Unknown | 1996-06-10 |
| Movie | Executive Decision | Unknown | 1996 |
| Movie | A Time to Kill | Harry Rex Vonner | 1996-07-24 |
| Movie | Big Night | Unknown | 1996 |
| Movie | Funny Bones | Unknown | 1995 |
| Movie | Tall Tale | Unknown | 1995 |
| Movie | The Infiltrator | Unknown | 1995 |
| Series | American Masters | Unknown | 1994 |
| Movie | The Making of 'The Three Musketeers' | Unknown | 1993 |
| Movie | Indecent Proposal | Unknown | 1993 |
| Movie | Benny & Joon | Unknown | 1993 |
| Movie | The Temp | Jack Hartsell | 1993-02-12 |
| Series | Late Show with David Letterman | Unknown | 1993-08-30 |
| Series | Late Night with Conan O'Brien | Unknown | 1993-09-13 |
| Movie | The Three Musketeers | Unknown | 1993-11-12 |
| Movie | Beethoven | Unknown | 1992 |
| Movie | AFI Life Achievement Award: A Tribute to Sidney Poitier | Unknown | 1992 |
| Series | The Tonight Show with Jay Leno | Unknown | 1992-05-25 |
| Movie | Diggstown | Unknown | 1992 |
| Series | Charlie Rose | Unknown | 1991-09-30 |
| Movie | Postcards from the Edge | Unknown | 1990 |
| Movie | Flatliners | Unknown | 1990-08-10 |
| Series | The Word | Unknown | 1990-08-10 |
| Movie | Married to the Mob | Unknown | 1988-08-19 |
| Series | American Experience | Unknown | 1988-10-04 |
| Movie | Crusoe | Unknown | 1988 |
| Movie | Working Girl | Unknown | 1988 |
| Series | Tattinger's | Unknown | 1988 |
| Series | Wiseguy | Unknown | 1987-09-16 |
| Series | The Equalizer | Unknown | 1985-09-18 |
| Series | Larry King Live | Unknown | 1985-06-03 |
| Series | Miami Vice | Unknown | 1984-09-16 |
| Series | Nova | Unknown | 1974-03-03 |
| Series | Film 2016 | Unknown | 1971-11-16 |
| Series | Today | Unknown | 1952-01-14 |