Actor
- Comedy Connections Ripping Yarns (2008) .... Himself
- Greetings (2007) .... Ken
- House of Donn (2006) .... Dad
- A Nearly Silent Film (2006) .... Signwriter
- Like Father Like Son (2005) .... Rawsthorne
- George Harrison - Der sanfte Beatle (2001) .... (archive footage)
- Shadow Run (1998) .... Larcombe
- Brassed Off (1997) .... Greasley (as Ken Colley)
- Último viaje de Robert Rylands, El (1996) .... Archdale
- Solomon & Sheba (1995) .... Nathan
- Capital Lives (1994) .... (1 episode, 1994)
- Unnatural Causes (1994) .... Inspector Gerry Reckless
- La Vie de bohème (1993) .... Balayeur de rues
- The Secret Life of Arnold Bax (1992) .... John Ireland
- Prisoner of Honor (1991) .... Capt. Dreyfus
- The Last Island (1990) .... Nick
- I Hired a Contract Killer (1990) .... The Killer
- The Plot to Kill Hitler (1990) .... Field Marshal Wilhelm Keitel
- The Kremlin, Farewell (1990) .... Sergej
- A Summer Story (1989) .... Jim (as Ken Colley)
- The Rainbow (1989) .... Mr. Brunt
- The Whistle Blower (1987) .... Bill Pickett
- Casanova (1987) .... Le Duc
- Return to Treasure Island (1986) .... Ben Gunn
- Mussolini: The Untold Story (1985) .... King Vittorio Emmanuele
- Return to Waterloo (1985) .... The Traveller
- Wallenberg: A Hero's Story (1985) .... Adolph Eichmann
- Star Wars: Episode VI - Return of the Jedi (1983) .... Admiral Piett
- The Scarlet and the Black (1983) .... Capt. Hirsch (as Ken Colley)
- Firefox (1982) .... Colonel Kontarsky
- I Remember Nelson (1982) .... Vice-Adm. Horatio Viscount Nelson
- Giro City (1982) .... Martin
- Peter and Paul (1981) .... Theodotus
- Star Wars: Episode V - The Empire Strikes Back (1980) .... Admiral Piett
- Life of Brian (1979) .... Jesus
- Measure for Measure (1979) .... Duke Vincentio
- Miserables, Les (1978) .... Police Prefect
- Pennies from Heaven (1978) .... The Accordion Man / ... (5 episodes, 1978)
- Jabberwocky (1977) .... First Fanatic
- Lisztomania (1976) .... Frederic Chopin (as Ken Colley)
- The Artisan (1975) ....
- Beata Beatrix (1975) ....
- Remember Me (1975) ....
- Flame (1975) .... Tony Devlin
- Juggernaut (1974) .... Detective Brown
- Mahler (1974) .... Krenek (as Ken Colley)
- Hitler: The Last Ten Days (1973) .... Boldt
- The Triple Echo (1972) .... Provo Corporal
- The Rivals of Sherlock Holmes (1971) .... Farrish (2 episodes, 1971)
- The Devils (1971) .... Legrand
- The Music Lovers (1971) .... Modeste Tchaikovsky
- Performance (1970) .... Tony Farrell (as Ken Colley)
- The Blood Beast Terror (1969) .... James
- How I Won the War (1967) .... 2nd Replacement
- The Jokers (1967) .... De Winter (chauffeur)
- Look and Read (1967) .... Mr. Moon (8 episodes, 1968)
- Thirty-Minute Theatre (1965) .... Adolf Hitler / ... (3 episodes, 1967-1970)
- Seventy Deadly Pills (1964) ....
- Greetings (2007) ....
- A Nearly Silent Film (2006) ....
- Greetings (2007) .... producer
- Greetings (2007) .... written by
- A Nearly Silent Film (2006) .... writer


