Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Actor | Una notte al museo 2 - La fuga | 2009 | Ivan the Terrible |
| Actor | Saturday Night Live | Christopher Guest | |
| Actor | La storia fantastica | 1987 | Count Tyrone Rugen |
| Actor | Codice d'onore | 1992 | Dr. Stone |
| Actor | Il Primo dei Bugiardi | 2009 | Nathan Goldfrappe |
| Actor | La piccola bottega degli orrori | 1986 | The First Customer |
| Actor | Small Soldiers | 1998 | Slamfist / Scratch-It |
| Actor | This Is Spinal Tap | 1984 | |
| Writer | This Is Spinal Tap | 1984 | |
| Actor | Campioni di razza | 2000 | Harlan Pepper |
| Director | Campioni di razza | 2000 | |
| Writer | Campioni di razza | 2000 | |
| Actor | Il giustiziere della notte | 1974 | Patrolman Reilly |
| Actor | SpongeBob SquarePants: Who Bob What Pants? | 2008 | Stanley S. SquarePants |
| Actor | Sognando Broadway | 1996 | Corky St. Clair |
| Director | Sognando Broadway | 1996 | |
| Writer | Sognando Broadway | 1996 | |
| Actor | Mascots | 2016 | Corky St. Clair |
| Writer | Mascots | 2016 | |
| Director | Mascots | 2016 | |
| Actor | A mighty wind. Amici per la musica | 2003 | Alan Barrows |
| Director | A mighty wind. Amici per la musica | 2003 | |
| Writer | A mighty wind. Amici per la musica | 2003 | |
| Director | Almost Heroes | 1998 | |
| Actor | For Your Consideration | 2006 | Jay Berman |
| Director | For Your Consideration | 2006 | |
| Writer | For Your Consideration | 2006 | |
| Actor | I cavalieri dalle lunghe ombre | 1980 | Charlie Ford |
| Actor | Girlfriends | 1978 | Eric |
| Actor | Lady Henderson presenta | 2005 | Lord Cromer |
| Director | Il grande regista | 1989 | |
| Writer | Il grande regista | 1989 | |
| Writer | Il grande regista | 1989 | |
| Actor | La pietra che scotta | 1972 | Policeman |
| Director | Una donna in 'crescendo' | 1993 | |
| Actor | Se non vieni a vedere questo film ammazziamo il cane - The Story of the National Lampoon | 2015 | Himself / Actor |
| Actor | The Missing Link | 1980 | No Lobes |
| Actor | Due uomini e una dote | 1975 | Boy Lover |
| Actor | Misery Loves Comedy | 2015 | Himself |
| Actor | Mr. Warmth: The Don Rickles Project | 2007 | Himself |
| Actor | Spinal Tap: The Final Tour | 1994 | Nigel Tufnel |
| Writer | Spinal Tap: The Final Tour | 1994 |