2026Who Is Martin Mull?— Self
2023The Water Is Finally Blue: The Untold Story of Robert Altman's O.C. and Stiggs— Self – Interviewee (voice)
2022Who Done It: The Clue Documentary— Self (archive footage) (uncredited)
2022Melons— Mr. Sunnyside
2013Ha/lf— Grandpa Rich
2013Tim’in Vermeer’i— Himself
2011And They're Off— Ken Sanders
2011Oliver's Ghost— Clive
2010Kiminle Evlendim— Holbrook
20102Everything2Terrible2: Tokyo Drift— (archive footage)
2006Relative Strangers— Jeffry Morton
2005The Aristocrats— Self
2005Come Away Home— Barney
2005Danny Phantom: The Ultimate Enemy— Vlad Masters (voice)
2004A Boyfriend for Christmas— Martin Grant
2002The Year That Trembled— Wayne Simonelli
2001Sister Mary Explains It All— Skeptical Husband
2000Attention Shoppers— Charles
1999Yesterday's Tomorrows— Self
1998Richie Rich'in Yeni Yıl Dileği— Mr. Rich
1998Zack and Reba— Virgil Payne
1997Beverly Hills Family Robinson— Doug Robinson
1996Edie & Pen— Johnnie Sparkle
1996The Brown Blues— Himself
1994How the West Was Fun— Bart Gafooley
1994Mr. Write— Dan Barnes
1993Müthiş Dadı... Müthiş Baba— Justin Gregory
1993The Day My Parents Ran Away— Norman Roberts
1993Sex, Shock & Censorship in the 90's— “Love Thy Neighbor" Host
1992Oyuncular— Martin Mull
1992Miracle Beach— Donald Burbank
1992Dance with Death— Art
1992Martin Mull: Talent Takes a Holiday— Self
1991Tom Arnold: The Naked Truth— Self
1991Ted & Venus— Ted's Attorney
1990Ski Patrol— Maris
1990Far Out Man— Psychiatrist
1989Okuldaki Cinayet— William Carson III
1989Think Big— Dr. Bruekner
1988Portrait of a White Marriage— Martin Mull
1988Rented Lips— Archie Powell
1988An All-Star Toast to the Improv— Self
1987O.C. and Stiggs— Pat Coletti
1987Jonathan Winters: On the Ledge
1987Home Is Where the Hart Is— Carson Boundy
1987Martin Mull Live from North Ridgeville, Ohio— Self
1986The Boss' Wife— Tony Dugdale
1986Pecos Bill— Governor Ambrose Peasley
1986The History of White People in America: Volume II— Himself - Host
1985Clue— Colonel Mustard
1985Lots of Luck— Frank Maris
1985The History of White People in America— Host
1985California Girls— Elliot
1984Bad Manners— Warren Fitzpatrick
1984The Jerk, Too— Gambler (uncredited)
1983Bay Anne— Ron
1983Sunset Limousine— Mel Shaver (uncredited)
1983Özel Okul— Drug Store Clerk (uncredited)
1983Flicks— Tang / Arthur Lyle
1983Grandpa, Will You Run with Me?— Self - Sketch Performer
1982Twilight Theatre
1982Magic with the Stars— Self
1982Twilight Theater II— Self- Guest
1981Take This Job and Shove It— Dick Ebersol
1980Serial— Harvey
1980Özel Koruma— Mr. L.C. Peache
1979The Chevy Chase National Humor Test
1979The T.V. Show
1978FM— Eric Swan
1978A Different Approach
—The Tom and Dick Smothers Brothers Special II— Self
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