- The 9th Wonder of the World: The Making of 'Gorgo'
2013 The Villain Antony (archive footage)
- Hitler: The Comedy Years
2007 Dr. Strangelove / Fred Kite (archive footage) (uncredited)
- Trail of the Pink Panther
1982 Chief Insp. Jacques Clouseau (archive footage)
- The Fiendish Plot of Dr. Fu Manchu
1980 Fu Manchu / Nayland Smith
- The Prisoner of Zenda
1979 Rudolf IV/Rudolf V/Sidney Frewin
- Being There
1979 Chance
- Revenge of the Pink Panther
1978 Chief Inspector Clouseau
- Kingdom Of Gifts
1978 The Slightly Larcenous Mayor
- To See Such Fun
1977
- Murder by Death
1976 Sidney Wang
- The Pink Panther Strikes Again
1976 Chief Inspector Clouseau
- The Return of the Pink Panther
1975 Inspector Clouseau
- The Great McGonagall
1975 Queen Victoria
- Julie: My Favourite Things
1975 Various
- Soft Beds, Hard Battles
1974 Général Latour / Major Robinson / Herr Schroeder / Adolf Hitler / The President / Prince Kyoto
- The Blockhouse
1973 Rouquet
- The Optimists of Nine Elms
1973 Sam
- Ghost in the Noonday Sun
1973 Dick Scratcher
- Alice's Adventures in Wonderland
1972 The March Hare
- Where Does It Hurt?
1972 Dr. Albert T. Hopfnegal
- Hoffman
1970 Mr. Hoffman
- There's a Girl in My Soup
1970 Robert Danvers
- A Day at the Beach
1970 Stallholder
- Simon Simon
1970 Man with Two Cars
- Wilton's: The Handsomest Hall in Town
1970 G.W. Ross
- The Magic Christian
1969 Additional Writing
- The Party
1968 Hrundi V. Bakshi
- I Love You, Alice B. Toklas!
1968 Harold
- Casino Royale
1967 Evelyn Tremble
- Woman Times Seven
1967 Jean
- The Bobo
1967 Juan Bautista
- Alice in Wonderland
1966 King of Hearts
- The Wrong Box
1966 Doctor Pratt
- After the Fox
1966 Aldo Vanucci/Federico Fabrizi
- What's New Pussycat?
1965 Dr. Fritz Fassbender
- Birds, Bees and Storks
1965 Narrator (voice)
- Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb
1964 Group Capt. Lionel Mandrake / President Merkin Muffley / Dr. Strangelove
- A Shot in the Dark
1964 Jacques Clouseau
- The World of Henry Orient
1964 Henry Orient
- Carol for Another Christmas
1964 Imperial Me
- I Say I Say I Say
1964 Director
- The Caretaker
1964 Thanks
- The Pink Panther
1963 Insp. Jacques Clouseau
- The Wrong Arm of the Law
1963 Pearly Gates
- Heavens Above!
1963 The Rev. John Smallwood
- Lolita
1962 Clare Quilty
- The Road to Hong Kong
1962 Indian Neurologist (uncredited)
- The Dock Brief
1962 Wilfred Morgenhall
- Waltz of the Toreadors
1962 Gen. Leo Fitzjohn
- Only Two Can Play
1962 John Lewis
- Mr. Topaze
1961 Director
- The Millionairess
1960 Dr. Kabir
- Never Let Go
1960 Lionel Meadows
- The Battle of the Sexes
1960 Mr. Martin
- Two-Way Stretch
1960 Dodger Lane
- The Mouse That Roared
1959 Grand Duchess Gloriana XII / Prime Minister Count Rupert Mountjoy / Tully Bascombe
- I'm All Right Jack
1959 Fred Kite / Sir John Kennaway
- Carlton-Browne of the F.O.
1959 Prime Minister Amphibulos
- The Running Jumping & Standing Still Film
1959 Writer
- Tom Thumb
1958 Antony
- Up the Creek
1958 CPO Doherty
- The Smallest Show on Earth
1957 Percy Quill
- The Naked Truth
1957 "Wee" Sonny MacGregor
- Dearth of a Salesman
1957 Hector Dimwittie
- Insomnia is Good for You
1957 Hector Dimwittie
- The Case of the Mukkinese Battle-Horn
1956 Additional Writing
- The Man Who Never Was
1956 Voice of Winston Churchill (uncredited)
- The Ladykillers
1955 Harry, alias 'Mr. Robinson'
- John and Julie
1955 Police Constable Diamond
- Orders Are Orders
1954 Pvt. Goffin
- Our Girl Friday
1953 Voice of Parrot
- Beat the Devil
1953 Billy Dannreuther (voice) (uncredited)
- The Super Secret Service
1953 Sir Walter Smood / Reuben J. Crouch
- Down Among the Z Men
1952 Major Bloodnok
- Penny Points to Paradise
1951 The Major / Arnold Fringe
- Let's Go Crazy
1951 Writer
- The Slappiest Days of Our Lives
1951 (archive footage)
- A Burlesque on the Opera "Carmen"
1951 Voice narrator
- The Black Rose
1950 Lu Chung (voice)
- Hybrid Creatures
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