| ایل | آدی | روْل | نوت |
|---|
| 1921 | Innocent | Amadis de Jocelyn | |
| The Fruitful Vine | Don Cesare Carelli | |
| 1923 | The School for Scandal | Joseph Surface | |
| The Loves of Mary, Queen of Scots | Undetermined روْل | Uncredited |
| 1924 | Trouping with Ellen | Tony Winterslip | |
| 1925 | The Masked Bride | Antoine | |
| 1926 | The Great Deception | Rizzio | |
| 1929 | The Last of Mrs. Cheyney | Lord Arthur Dilling | |
| 1930 | The Bishop Murder Case | Philo Vance | |
| This Mad World | Paul Parisot | |
| A Notorious Affair | Paul Gherardi | |
| The Flirting Widow | Colonel John "Johnny" Vaughn-Smith | |
| The Lady of Scandal | Edward, Duke of Warrington | |
| The Lady Surrenders | Carl Vandry | |
| Sin Takes a Holiday | Reginald "Reggie" Durant | |
| 1932 | A Woman Commands | Capt. Alex Pastitsch | |
| After the Ball | Jack Harrowby | |
| 1933 | One Precious Year | Derek Nagel | |
| Loyalties | Ferdinand de Levis | |
| 1935 | David Copperfield | Mr. Murdstone | |
| Anna Karenina | Karenin | |
| The Last Days of Pompeii | Pontius Pilate | |
| A Feather in Her Hat | Captain Randolph Courtney | |
| Kind Lady | Henry Abbott | |
| A Tale of Two Cities | Marquis St. Evremonde | |
| Captain Blood | Levasseur | |
| 1936 | Private Number | Thomas Wroxton | |
| Romeo and Juliet | Tybalt - Nephew to Lady Capulet | Nominated — Academy Award for Best Supporting Actor |
| The Garden of Allah | Count Ferdinand Anteoni | |
| 1937 | Love from a Stranger | Gerald Lovell | |
| Confession | Michael Michailow, aka Michael Koslov | |
| Make a Wish | Johnny Selden | |
| Tovarich | Commissar Dimitri Gorotchenko | |
| 1938 | The Adventures of Marco Polo | Ahmed | |
| The Adventures of Robin Hood | Sir Guy of Gisbourne | |
| If I Were King | King Louis XI | Nominated — Academy Award for Best Supporting Actor |
| The Dawn Patrol | Major Brand | |
| 1939 | Son of Frankenstein | Baron Wolf von Frankenstein | |
| The Hound of the Baskervilles | Sherlock Holmes | |
| The Sun Never Sets | Clive Randolph | |
| The Adventures of Sherlock Holmes | Sherlock Holmes | |
| Rio | Paul Reynard | |
| Tower of London | Richard - Duke of Gloucester | |
| 1940 | Rhythm on the River | Oliver Courtney | |
| The Mark of Zorro | Captain Esteban Pasquale | |
| 1941 | The Mad Doctor | Dr. George Sebastian | According to IMDb, it was released on November 9, 1940, in Mexico. |
| The Black Cat | Montague Hartley | |
| International Lady | Reggie Oliver | |
| Paris Calling | Andre Benoit | |
| 1942 | Fingers at the Window | Cesar Ferrari, alias Dr. H. Santelle | |
| Crossroads | Henri Sarrou | |
| Sherlock Holmes and the Voice of Terror | Sherlock Holmes | |
| Sherlock Holmes and the Secret Weapon | Sherlock Holmes | |
| 1943 | Sherlock Holmes in Washington | Sherlock Holmes | |
| Above Suspicion | Sig von Aschenhausen | |
| Sherlock Holmes Faces Death | Sherlock Holmes | |
| Crazy House | Sherlock Holmes | Cameo appearance |
| The Spider Woman | Sherlock Holmes | |
| 1944 |
| Bathing Beauty | George Adams | |
| The Pearl of Death | Sherlock Holmes | |
| The Scarlet Claw | Sherlock Holmes | |
| Frenchman's Creek | Lord Rockingham | |
| 1945 | The House of Fear | Sherlock Holmes | |
| The Woman in Green | Sherlock Holmes | |
| Pursuit to Algiers | Sherlock Holmes | |
| 1946 | Terror by Night | Sherlock Holmes | |
| Heartbeat | Professor Aristide | |
| Dressed to Kill | Sherlock Holmes | |
| 1949 | The Adventures of Ichabod and Mr. Toad | Narrator | segment "The Wind in the Willows" |
| 1953 | Season's Greetings | | TV movie |
| 1954 | Casanova's Big Night | Lucio / Narrator | |
| "A Christmas Carol" | Jacob Marley. | A Shower of Stars episode |
| 1955 | We're No Angels | Andre Trochard | |
| Svengali and the Blonde | Svengali | TV movie |
| The Court Jester | Sir Ravenhurst | |
| 1956 | The Black Sleep | Sir Joel Cadman | |
| 1957 | The Lark | Chief Inquisitor | TV movie |
| 1958 | Hans Brinker and the Silver Skates | Dr. Boekman | TV movie |
| The Last Hurrah | Norman Cass, Sr. | |
| 1961 | Victoria Regina[۱] | Benjamin Disraeli | TV movie |
| The Black Cat | Voices | A short |
| Mystic Prophecies and Nostradamus | Narrator | |
| 1962 | The Magic Sword | Lodac | |
| Ponzio Pilato | Caiaphas | |
| Tales of Terror | Carmichael | segment "The Facts in the Case of M. Valdemar" |
| Two Before Zero (aka Red Hell) | Narrator | |
| 1963 | The Comedy of Terrors | John F. Black, Esq. | |
| 1965 | Voyage to the Prehistoric Planet | Prof. Hartman, Lunar 7 | |
| Dr. Rock and Mr. Roll | | |
| 1966 | Queen of Blood | Dr. Farraday | |
| The Ghost in the Invisible Bikini | Reginald Ripper | |
| 1967 | Hillbillys in a Haunted House | Gregor | |
| 1968 | Autopsia de un fantasma | Canuto Perez | final film role |
| 1986 | The Great Mouse Detective | Sherlock Holmes | archive sound, released posthumously |
