| tv | Everybody's Live with John Mulaney (2025)As Self - Former TV Celebrity, 6'2" | (Not seen) |
| movie | In Whose Name? (2025)As Self | (Not seen) |
| movie | John Candy: I Like Me (2025)As Self - Host, Late Night with David Letterman (archive footage) | (Not seen) |
| tv | John Mulaney Presents: Everybody's in L.A. (2024)As Self | (Not seen) |
| tv | Mr. McMahon (2024)As Self (archive footage) | (Not seen) |
| movie | The Menendez Brothers (2024) | (Not seen) |
| movie | Brats (2024) | (Not seen) |
| movie | Albert Brooks: Defending My Life (2023)As Self | (Not seen) |
| tv | Untold: The Girlfriend Who Didn't Exist (2022)As Self - Host of 'Late Night with David Letterman' (archive footage) | (Not seen) |
| movie | Sr. (2022) (AKA ""Sr."") | (Not seen) |
| movie | Halftime (2022) (AKA "Jennifer Lopez: Halftime") | (Not seen) |
| tv | This Is Pop (2021)As Self (archive footage) | (Not seen) |
| tv | The Comedy Store (2020)As Self | (Not seen) |
| movie | This Is Paris (2020) | (Not seen) |
| movie | Miss Americana (2020) | (Not seen) |
| movie | Between Two Ferns: The Movie (2019)As David Letterman | (Not seen) |
| tv | My Next Guest Needs No Introduction with David Letterman (2018)As Self - Host | (Not seen) |
| movie | Robin Williams: Come Inside My Mind (2018)As Self | (Not seen) |
| movie | Won't You Be My Neighbor? (2018)As Self - TV Host (archive footage) | (Not seen) |
| movie | The Wizard of Lies (2017) | (Not seen) |
| movie | O.J.: Made in America (2016) | (Not seen) |
| tv | The Late Show with Stephen Colbert (2015)As Self - Guest | (Not seen) |
| movie | Amy (2015) (AKA "Raw: The Amy Winehouse Story") | (Not seen) |
| tv | Last Week Tonight with John Oliver (2014)As Self | (Not seen) |
| tv | Late Night with Seth Meyers (2014)As Self | (Not seen) |
| tv | Comedians in Cars Getting Coffee (2012)As Self | (Not seen) |
| movie | I'm Still Here (2010) (AKA "I'm Still Here: The Lost Years of Joaquin Phoenix")As David Letterman | (Not seen) |
| movie | American Splendor (2003)As Self (archive footage) | (Not seen) |
| movie | Man on the Moon (1999) (AKA "Andy Kaufman")As David Letterman | (Not seen) |
| movie | Private Parts (1997) (AKA "Howard Stern's Private Parts")As David Letterman | (Not seen) |
| movie | Beavis and Butt-Head Do America (1996)As Mötley Crüe Roadie (voice) | (Not seen) |
| movie | Eddie (1996)As David Letterman (uncredited) | (Not seen) |
| tv | The Nanny (1993)As David Letterman (uncredited) | (Not seen) |
| tv | The Larry Sanders Show (1992)As David Letterman | (Not seen) |
| tv | The Simpsons (1989)As David Letterman (voice) | (Not seen) |
| tv | Seinfeld (1989)As David Letterman | (Not seen) |
| tv | The Oscars (1953)As Self | (Not seen) |