Filmography59 titles
| Year | Title | Character | Age at release |
|---|---|---|---|
| 2025 | EddingtonMovie | Joe Cross | 51 |
| 2024 | Joker: Folie à DeuxMovie | Arthur Fleck | 50 |
| 2023 | Beau Is AfraidMovie | Beau Wassermann | 49 |
| 2023 | Finally Home: Making Beau is AfraidMovie | Self | 49 |
| 2021 | C'mon C'monMovie | Johnny | 47 |
| 2020 | Guardians of LifeMovie | — | 46 |
| 2019 | JokerMovie | Arthur Fleck | 45 |
| 2018 | DominionMovie | Narrator (voice) | 44 |
| 2018 | The Sisters BrothersMovie | Charlie Sisters | 44 |
| 2018 | LouMovie | Karl | 44 |
| 2018 | Mary MagdaleneMovie | Jesus | 44 |
| 2017 | You Were Never Really HereMovie | Joe | 43 |
| 2015 | The Late Show with Stephen ColbertSeries | Self | 41 |
| 2015 | UnityMovie | Narrator (voice) | 41 |
| 2015 | Chryskylodon BluesMovie | Self | 41 |
| 2015 | Irrational ManMovie | Abe | 41 |
| 2014 | The Tonight Show Starring Jimmy FallonSeries | Self - Guest | 40 |
| 2014 | Inherent ViceMovie | Larry "Doc" Sportello | 40 |
| 2014 | Her: Love in the Modern AgeMovie | Self (archive footage) | 40 |
| 2014 | Her: The Untitled Rick Howard ProjectMovie | Self | 40 |
| 2013 | HerMovie | Theodore | 39 |
| 2013 | The ImmigrantMovie | Bruno Weiss | 39 |
| 2013 | The Master: Unguided MessageMovie | — | 39 |
| 2012 | The MasterMovie | Freddie Quell | 38 |
| 2010 | I'm Still HereMovie | Joaquin Phoenix | 36 |
| 2008 | Two LoversMovie | Leonard Kraditor | 34 |
| 2007 | Reservation RoadMovie | Ethan Learner | 33 |
| 2007 | We Own the NightMovie | Bobby Green | 33 |
| 2006 | Final 24: River PhoenixMovie | Self (voice) (archive footage) | 32 |
| 2004 | The VillageMovie | Lucius Hunt | 30 |
| 2004 | Ladder 49Movie | Jack Morrison | 30 |
| 2003 | Jimmy Kimmel Live!Series | Self - Guest | 29 |
| 2003 | Brother BearMovie | Kenai (voice) | 29 |
| 2003 | Making 'Signs'Movie | Self / Merrill Hess | 29 |
| 2002 | SignsMovie | Merrill Hess | 28 |
| 2001 | Good Day LiveSeries | Self | 27 |
| 2000 | GladiatorMovie | Commodus | 26 |
| 2000 | The YardsMovie | Willie Gutierrez | 26 |
| 2000 | QuillsMovie | Abbe du Coulmier | 26 |
| 1999 | 8MMMovie | Max California | 25 |
| 1998 | Clay PigeonsMovie | Clay Bidwell | 24 |
| 1997 | U TurnMovie | Toby N. Tucker | 23 |
| 1997 | Inventing the AbbottsMovie | Doug Holt | 23 |
| 1995 | To Die ForMovie | Jimmy Emmett | 21 |
| 1992 | The Tonight Show with Jay LenoSeries | — | 18 |
| 1992 | Walking the DogMovie | Mischievous Teenage Boy | 18 |
| 1989 | ParenthoodMovie | Garry Buckman-Lampkin | 15 |
| 1988 | LIVE with Kelly and MarkSeries | Self - Guest | 14 |
| 1988 | Secret WitnessMovie | Drew Blackburn | 14 |
| 1986 | SpaceCampMovie | Max | 12 |
| 1985 | The New Alfred Hitchcock PresentsSeries | Pagey Fisher | 11 |
| 1985 | Kids Don't TellMovie | Frankie | 11 |
| 1984 | Murder, She WroteSeries | Billy Donovan | 10 |
| 1984 | Backwards: The Riddle of DyslexiaMovie | Robby Ellsworth | 10 |
| 1983 | Mr. SmithSeries | — | 9 |
| 1982 | Seven Brides for Seven BrothersSeries | Travis | 8 |
| 1981 | Hill Street BluesSeries | — | 7 |
| 1968 | 60 MinutesSeries | Self | — |
| 1953 | The OscarsSeries | Self | — |