Filmography
| Year | Title | Role |
| 1964 | The Pumpkin Eater | Mr. James |
| 1957 | Baby Face Nelson | Doc Saunders |
| 1957 | The Story of Mankind | High Judge |
| 1956 | The Ten Commandments (1956) | Sethi |
| 1956 | Around the World in 80 Days (1956) | Sir Francis Gromarty |
| 1956 | Gaby | Mr. Edgar Carrington |
| 1956 | The Vagabond King | Tristan |
| 1955 | Helen of Troy | Priam |
| 1955 | Richard III | King Edward IV of England |
| 1952 | The Green Glove | Father Goron |
| 1951 | Mr. Imperium | Bernand |
| 1950 | The White Tower | Dr. Nicholas Radcliffe |
| 1949 | A Connecticut Yankee in King Arthur's Court | Lord Pendragon / King Arthur |
| 1948 | I Remember Mama | Mr. Hyde |
| 1948 | Rope | Mr. Kentley (as Sir Cedric Hardwicke) |
| 1947 | Nicholas Nickleby (1946) | Ralph Nickleby |
| 1947 | Lured | Julian Wilde |
| 1947 | Tycoon | Frederick Alexander |
| 1947 | A Woman's Vengeance | Dr. James Libbard |
| 1947 | Ivy | Insp. Orpington |
| 1946 | Beware of Pity | Dr. Albert Condor |
| 1944 | The Lodger (2009) | Robert Bonting |
| 1944 | Wilson (1944) | Sen. Henry Cabot Lodge |
| 1944 | The Keys of the Kingdom | Monsignor at Tweedside |
| 1944 | The Cross of Lorraine | Father Sebastian |
| 1943 | Forever and a Day (1943) | Director |
| 1943 | The Moon Is Down | Col. Lanser |
| 1942 | The Ghost of Frankenstein | Ludwig Frankenstein |
| 1942 | Invisible Agent | Conrad Stauffer |
| 1941 | Suspicion | General McLaidlaw (as Sir Cedric Hardwicke) |
| 1941 | Sundown (1941) | Bishop Coombes |
| 1940 | The Howards Of Virginia | Fleetwood Peyton |
| 1940 | The Invisible Man Returns | Richard Cobb |
| 1940 | Adventures at Rugby | Dr. Thomas Arnold |
| 1939 | Stanley and Livingstone | Dr. David Livingstone |
| 1939 | The Hunchback of Notre Dame (1939) | Frollo |
| 1937 | King Solomon's Mines (1937) | Allan Quatermain |
| 1936 | Things to Come (1936) | Theotocopulos |
| 1936 | Tudor Rose | Earl of Warwick |
| 1935 | Les Miserables (1935) | Bishop Bienvenu |
| 1935 | Becky Sharp | Marquis of Steyne |
| 1934 | Nell Gwyn | Charles II |
| 1932 | Rome Express | Alistair McBane |
