 | The Water Is Finally Blue: The Untold Story of Robert Altman's O.C. and Stiggs (2023)
Self – Interviewee (voice) |
 | Who Done It: The Clue Documentary (2022)
Self (archive footage) (uncredited) |
 | Melons (2022)
Mr. Sunnyside |
 | A Futile and Stupid Gesture (2018)
Modern Doug |
 | Tim's Vermeer (2013)
Himself |
 | Ha/lf (2013)
Grandpa Rich |
 | And They're Off (2011)
Ken Sanders |
 | Oliver's Ghost (2011)
Clive |
 | 2Everything2Terrible2: Tokyo Drift (2010)
(archive footage) |
 | Killers (2010)
Holbrook |
 | Relative Strangers (2006)
Jeffry Morton |
 | The Aristocrats (2005)
Self |
 | Come Away Home (2005)
Barney |
 | A Boyfriend for Christmas (2004)
Martin Grant |
 | The Year That Trembled (2002)
Wayne Simonelli |
 | Sister Mary Explains It All (2001)
Skeptical Husband |
 | Attention Shoppers (2000)
Charles |
 | Yesterday's Tomorrows (1999)
Self |
 | Zack and Reba (1998)
Virgil Payne |
 | Richie Rich's Christmas Wish (1998)
Richard Rich |
 | Beverly Hills Family Robinson (1997)
Doug Robinson |
 | Jingle All the Way (1996)
D.J. |
 | Edie & Pen (1996)
Johnnie Sparkle |
| | Sex, Censorship and the Silver Screen (1996)
Quote Reader |
 | How the West Was Fun (1994)
Bart Gafooley |
 | Mr. Write (1994)
Dan Barnes |
 | The Day My Parents Ran Away (1993)
Norman Roberts |
 | Mrs. Doubtfire (1993)
Justin Gregory |
 | Sex, Shock & Censorship in the 90's (1993)
“Love Thy Neighbor" Host |
 | Miracle Beach (1992)
Donald Burbank |
 | The Player (1992)
Martin Mull |
 | Dance with Death (1992)
Art |
 | Martin Mull: Talent Takes a Holiday (1992)
Self |
 | Ted & Venus (1991)
Ted's Attorney |
| | Tom Arnold: The Naked Truth (1991)
Self |
 | Far Out Man (1990)
Psychiatrist |
 | Ski Patrol (1990)
Maris |
 | Think Big (1989)
Dr. Bruekner |
 | Cutting Class (1989)
William Carson III |
 | Portrait of a White Marriage (1988)
Martin Mull |
 | An All-Star Toast to the Improv (1988)
Self |
 | Rented Lips (1987)
Archie Powell |
 | Martin Mull Live from North Ridgeville, Ohio (1987)
Self |
 | O.C. and Stiggs (1987)
Pat Coletti |
 | Home Is Where the Hart Is (1987)
Carson Boundy |
| | Jonathan Winters: On the Ledge (1987)
|
 | Pecos Bill (1986)
Governor Ambrose Peasley |
 | The Boss' Wife (1986)
Tony Dugdale |
 | The History of White People in America: Volume II (1986)
Himself - Host |
 | Clue (1985)
Colonel Mustard |
 | The History of White People in America (1985)
Host |
 | California Girls (1985)
Elliot |
 | Lots of Luck (1985)
Frank Maris |
 | Bad Manners (1984)
Warren Fitzpatrick |
 | Sunset Limousine (1983)
Mel Shaver (uncredited) |
 | Flicks (1983)
Tang / Arthur Lyle |
 | Mr. Mom (1983)
Ron |
 | Private School (1983)
Drug Store Clerk (uncredited) |
| | Grandpa, Will You Run with Me? (1983)
Self - Sketch Performer |
 | Twilight Theatre (1982)
|
 | Magic with the Stars (1982)
|
 | Take This Job and Shove It (1981)
Dick Ebersol |
 | My Bodyguard (1980)
Mr. Peache |
 | Serial (1980)
Harvey |
| | The Chevy Chase National Humor Test (1979)
|
 | FM (1978)
Eric Swan |
 | A Different Approach (1978)
|
 | The Tom and Dick Smothers Brothers Special II
Self |