- Tammy and the Doctor (1963) .... Dr. Mark Cheswick
- The Victors (film) (1963) .... Weaver
- Lilith (1964) .... Stephen Evshevsky
- The Young Lovers (1964) .... Eddie Slocum
- The Wild Angels (1966) .... Heavenly Blues
- The Trip (1967/II) .... Paul Groves
- Histoires extraordinaires (1968) .... Baron Wilhelm (segment "Metzengerstein")
- Easy Rider (1969) .... Wyatt
- The Hired Hand (1971) .... Harry Collings
- The Last Movie (1971) .... Young sheriff
- Idaho Transfer (1973) .... Director
- Two People (1973) .... Evan Bonner
- Dirty Mary, Crazy Larry (1974) .... Larry Rayder
- Open Season (1974 film) (1974) .... Ken
- Race with the Devil (1975) .... Roger March
- 92 in the Shade (1975) .... Skelton
- Killer Force (1976) .... Bradley
- Futureworld (1976) .... Chuck Browning
- Fighting Mad (1976) .... Tom Hunter
- Outlaw Blues (1977) .... Bobby Ogden
- High-Ballin' (1978) .... Rane
- Wanda Nevada (1979) .... Beaudray Demerille
- Cannonball Run (1981) .... Chief Biker (cameo appearance)
- Split Image (1982) .... Kirklander
- Peppermint-Frieden (1983) .... Mr. Freedom
- Dance of the Dwarfs (1983) .... Harry Bediker
- Daijôbu, mai furendo (1983) .... Gonzy Traumerai
- Spasms (1983) .... Dr. Tom Brasilian
| - Certain Fury (1985) .... Rodney
- Hawken's Breed (1987)
- Mercenary Fighters (1988) .... Virelli
- The Rose Garden (1989) .... Herbert Schluter
- Fatal Mission (1990) .... Ken Andrews
- South Beach (1992) .... Jake
- Family Express (1992) .... Nick
- Deadfall (1993) .... Pete
- Bodies, Rest & Motion (1993) .... Motorcycle Rider
- Molly & Gina (1994) .... Larry Stanton...
- Love and a .45 (1994) .... Vergil Cheatham
- Nadja (1994) .... Dracula/Dr. Van Helsing
- Escape from L.A. (1996) .... Pipeline
- Grace of My Heart (1996) .... Guru Dave
- Ulee's Gold (1997) .... Ulysses 'Ulee' Jackson
- Painted Hero (1997) .... Ray the Cook
- The Passion of Ayn Rand (1999) .... Frank
- The Limey (1999) .... Terry Valentine
- South of Heaven, West of Hell (2000) .... Shoshonee Bill
- Thomas and the Magic Railroad (2000) .... Grandpa Burnett Stone
- Second Skin (2000/I) .... Merv Gutman
- Wooly Boys (2001) .... Stoney
- The Laramie Project (2002) .... Doctor Cantway
- The Heart Is Deceitful Above All Things (2004) .... Grandfather
- Grand Theft Auto: San Andreas (2004) .... The Truth (voice)
- Ghost Rider (2007) .... Mephistopheles
- Wild Hogs (2007) .... Damien Blade
- 3:10 to Yuma (2007) .... Byron McElroy
- Japan (2007).... Alfred
- The Gathering (2007) (mini tv series) (pre - Production)
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