| Movie | 1960 | Ocean's Eleven | Jimmy Foster | |
| Movie | 1960 | Exodus | Maj. Caldwell | |
| Movie | 1975 | Rosebud | Lord Carter | |
| Movie | 1954 | It Should Happen to You | Evan Adams III | |
| Movie | 1959 | Never So Few | Capt. Grey Travis | |
| Movie | 1979 | Mysterious Island of Beautiful Women | Gordon Duvall | |
| Movie | 1947 | Good News | Tommy Marlowe | |
| Movie | 1964 | Dead Ringer | Tony Collins | |
| Movie | 1979 | Angels' Brigade | Burke | |
| Movie | 1965 | Harlow | Paul Bern | |
| Movie | 1962 | The Longest Day | Lord Lovat | |
| Movie | 1968 | Skidoo | The Senator | |
| Movie | 1968 | Buona Sera, Mrs. Campbell | Justin Young | |
| Movie | 1970 | One More Time | Christopher Pepper / Lord Sydney Pepper | |
| Movie | 1968 | Salt & Pepper | Christopher Pepper | |
| Movie | 1948 | Easter Parade | Jonathan Harrow III | |
| Movie | 1949 | The Red Danube | Major John 'Twingo' McPhimister | |
| Movie | 1945 | Son of Lassie | Joe Carraclough | |
| Movie | 1949 | Little Women | Theodore "Laurie" Laurence | |
| Movie | 1948 | On an Island with You | Lt. Lawrence Y. Kingslee | |
| Movie | 1972 | They Only Kill Their Masters | Lee Campbell | |
| Movie | 2019 | Sid & Judy | Self (archive photos) | |
| Movie | 1945 | The Picture of Dorian Gray | David Stone | |
| Movie | 1962 | Advise & Consent | Senator Lafe Smith | |
| Movie | 1962 | Sergeants 3 | Larry Barrett | |
| Movie | 1951 | Royal Wedding | Lord John Brindale | |
| Movie | 1944 | The Canterville Ghost | Anthony de Canterville | |
| Movie | 1944 | Mrs. Parkington | Lord Thornley | |
| Movie | 1947 | It Happened in Brooklyn | Jamie Shellgrove | |
| Movie | 1944 | The White Cliffs of Dover | John Ashwood II as a Young Man | |
| Movie | 1948 | Julia Misbehaves | Ritchie Lorgan | |
| Movie | 1946 | Cluny Brown | Andrew Carmel | |
| Movie | 1960 | Pepe | Peter Lawford | |
| Movie | 1977 | Fantasy Island | Grant Baines | |
| Movie | 1969 | The April Fools | Ted Gunther | |
| Movie | 1966 | The Oscar | Steve Marks | |
| Movie | 1950 | Please Believe Me | Jeremy Taylor | |
| Movie | 1965 | Sylvia | Frederic Summers | |
| Movie | 1938 | Lord Jeff | Benny Potter | |
| Movie | 1969 | Hook, Line and Sinker | Dr. Scott Carter | |
| Movie | 1984 | Where Is Parsifal? | Montague Chippendale | |
| Movie | 1947 | My Brother Talks to Horses | John S. Penrose | |
| Movie | 1952 | Kangaroo | Richard Connor | |
| Movie | 2023 | The Kennedy Dynasty | Self - Actor (archive footage) | |
| Movie | 1952 | You for Me | Tony Brown | |
| Movie | 1943 | The Man from Down Under | Mr. Jones | |
| Movie | 1966 | A Man Called Adam | Manny | |
| Movie | 1943 | The Sky's the Limit | Naval Commander (uncredited) | |
| Movie | 1952 | The Hour of 13 | Nicholas Revel | |
| Movie | 1967 | Dead Run | Stephen Daine | |
| Movie | 1967 | How I Spent My Summer Vacation | Ned Pine | |
| Movie | 1971 | A Step Out of Line | Art Stoyer | |
| Movie | 1943 | Sahara | British Soldier (uncredited) | |
| Movie | 1946 | Two Sisters from Boston | Lawrence Tyburt Patterson Jr. | |
| Movie | 1952 | Just This Once | Mark MacLene IV | |
| Movie | 1981 | Body and Soul | Big Man | |
| Movie | 2022 | Rat Pack | Self (archive footage) | |
| Movie | 1969 | The Two Kennedys | Self (archive footage) | |
| Movie | 2005 | Easter Parade: On the Avenue | Self (Archive Footage) | |
| Movie | 1942 | A Yank at Eton | Ronnie Kenvil | |
| Movie | 1953 | Rogue's March | Capt. Dion Lenbridge | |
| Movie | 1974 | That's Entertainment! | Self - Host / Narrator | |
| Movie | 1942 | Thunder Birds | English Cadet (uncredited) | |
| Movie | 1974 | The Phantom of Hollywood | Roger Cross | |
| Movie | 1943 | London Blackout Murders | Percy - Soldier on Train (uncredited) | |
| Movie | 1942 | Junior Army | Cadet Wilbur | |
| Movie | 1971 | Clay Pigeon | Government Agent | |
| Movie | 1943 | The Purple V | Roger | |
| Movie | 1943 | The West Side Kid | Jerry Winston | |
| Movie | 2002 | Sharon Tate: Murdered Innocence | Self (archive footage) (uncredited) | |
| Movie | 1943 | Immortal Sergeant | Soldier | |
| Movie | 1943 | Sherlock Holmes Faces Death | Young Sailor at Bar | |
| Movie | 1964 | Faces of November | Self (uncredited) | |
| Movie | 1942 | Eagle Squadron | Pilot | |
| Movie | 1943 | Someone to Remember | Joe Downes | |
| Movie | 1975 | Elizabeth Taylor: An Intimate Portrait | Host - Self | |
| Movie | 2003 | Live and Swingin': The Ultimate Rat Pack Collection | Self (archive footage) | |
| Movie | 1943 | Flesh and Fantasy | Pierrot (uncredited) | |
| Movie | 1942 | Mrs. Miniver | Pilot (uncredited) | |
| Movie | 1943 | Corvette K-225 | Naval Officer | |
| Movie | 1943 | Pilot #5 | British Soldier | |
| Movie | 1969 | The Fourth Wall | Papá Baroni | |
| Movie | 1931 | Poor Old Bill | Horace | |
| Movie | 1970 | Togetherness | Prince Solomon | |
| Movie | 1959 | The Frank Sinatra Timex Show: An Afternoon with Frank Sinatra | Self - Singer | |
| Movie | 1974 | James Dean Remembered | Self - Host | |
| Movie | 1943 | Above Suspicion | Student (Uncredited) | |
| Movie | 1991 | Preminger: Anatomy of a Filmmaker | actor 'Advise and 'Consent' (archive footage) (uncredited) | |
| Movie | 2011 | Paul Williams Still Alive | Self (archive footage) | |
| Movie | 1971 | The Deadly Hunt | Mason | |
| Movie | 1962 | President Kennedy's Birthday Salute | Self - Host | |
| Movie | 1962 | The Farmer's Daughter | Glen Morley | |
| Movie | 1975 | Gable: The King Remembered | Himself - Host / Narrator | |
| Movie | 1976 | Won Ton Ton: The Dog Who Saved Hollywood | Slapstick Star | |
| Movie | 1971 | Ellery Queen: Don't Look Behind You | Ellery Queen | |
| Movie | 1955 | Tom and Jerry | Tom Macy | |
| TV Show | 1968 | Hawaii Five-O | Kenneth Kirk | 1 |
| TV Show | 1975 | The Jeffersons | | 1 |
| TV Show | 1962 | The Merv Griffin Show | Self | 1 |
| TV Show | 1964 | Bewitched | | 1 |
| TV Show | 1953 | General Electric Theater | John | 1 |
| TV Show | 1955 | Alfred Hitchcock Presents | Charles 'Charlie' Ffolliot Raymond | 1 |
| TV Show | 1965 | The Wild Wild West | | 1 |
| TV Show | 1965 | Run for Your Life | Larry Carter | 1 |
| TV Show | 1962 | The Virginian | Ben Hunter | 1 |
| TV Show | 1964 | The Hollywood Palace | Self - Sketch Actor | 1 |
| TV Show | 1968 | Rowan & Martin's Laugh-In | Self | 9 |
| TV Show | 1951 | Schlitz Playhouse of Stars | | 2 |
| TV Show | 1957 | The Thin Man | Nick Charles | 72 |
| TV Show | 1963 | The Patty Duke Show | | 1 |
| TV Show | 1954 | Climax! | Tom Welles | 1 |
| TV Show | 1964 | Profiles in Courage | Gen. Alexander Doniphan | 1 |
| TV Show | 1956 | The Dinah Shore Chevy Show | Self | 4 |
| TV Show | 1956 | The Steve Allen Show | Self | 3 |
| TV Show | 1968 | The Beautiful Phyllis Diller Show | Self | 1 |
| TV Show | 1970 | The Smothers Brothers Summer Show | | 1 |
| TV Show | 1954 | The Jimmy Durante Show | Self | 5 |
| TV Show | 1954 | Dear Phoebe | Bill Hastings | 31 |
| TV Show | 1961 | The Mike Douglas Show | Self - Co-Host | 3 |
| TV Show | 1961 | The Mike Douglas Show | Self | 1 |
| TV Show | 1963 | The Judy Garland Show | Self | 1 |
| TV Show | 1968 | The Doris Day Show | Dr. Peter Lawrence | 1 |
| TV Show | 1948 | The Ed Sullivan Show | Self | 1 |
| TV Show | 1962 | The Tonight Show Starring Johnny Carson | Self | 4 |
| TV Show | 1962 | The Tonight Show Starring Johnny Carson | Self - Guest Host | 6 |
| TV Show | 1957 | Tonight Starring Jack Paar | Self | 1 |
| TV Show | 1967 | The Carol Burnett Show | Self | 1 |
| TV Show | 1956 | The Steve Allen Show | Self - Singer | 1 |
| TV Show | 1956 | The Steve Allen Show | Self - Guest | 1 |
| TV Show | 1956 | The Steve Allen Show | Self - The Thin Man | 2 |
| TV Show | 1977 | The Love Boat | Teddy Smith | 1 |
| TV Show | 1968 | The Dick Cavett Show | Self - Guest | 1 |
| TV Show | 1950 | What's My Line? | Self | 4 |
| TV Show | 1971 | The Pet Set | Self | 1 |
| TV Show | 1950 | What's My Line? | Self - Panelist | 4 |
| TV Show | 1962 | The Alfred Hitchcock Hour | Ernie Mullett | 1 |
| TV Show | 1999 | The Rat Pack | (archive footage) | 1 |
