| 1939: Hollywood's Greatest Year (2009) as Self (archive footage) |
| A Century of Science Fiction (1996) as Self |
| Dracula in the Movies (1992) as (archive footage) |
| Der andere Blick (1991) as Self |
| Dracula: A Cinematic Scrapbook (1991) as Count Dracula (archive footage) |
| Memories of Berlin: The Twilight of Weimar Culture (1976) as Self - Interviewee |
| Terror Is a Man (1959) as Dr. Charles Girard |
| Maracaibo (1958) as Miguel Orlando |
| The Return of Dracula (1958) as Count Dracula |
| Lisbon (1956) as Seraphim |
| The Ambassador's Daughter (1956) as Prince Nicholas Obelski |
| Stolen Identity (1953) as Claude Manelli |
| Abenteuer in Wien (1952) as Claude Manelli |
| Surrender (1950) as Henry Vaan |
| A Woman of Distinction (1950) as Paul Simone |
| Captain Carey, U.S.A. (1950) as Baron Rocco de Greffi |
| Million Dollar Weekend (1948) as Alan Marker |
| The Madonna's Secret (1946) as James Harlan Corbin |
| The Diary of a Chambermaid (1946) as Joseph |
| Voice in the Wind (1944) as Jan Volny / El Hombre |
| The Bridge of San Luis Rey (1944) as Esteban / Manuel |
| Puddin' Head (1941) as Prince Karl |
| The Man I Married (1940) as Eric Hoffman |
| Confessions of a Nazi Spy (1939) as Kurt Schneider |
| Midnight (1939) as Jacques Picot |
| The Lone Wolf in Paris (1938) as Michael Lanyard |
| It's All Yours (1937) as Jimmy Barnes |
| Screen Snapshots: Series 16, No. 12 (1937) as Self (uncredited) |
| My American Wife (1936) as Count Ferdinand von und zu Reidenach |
| One Rainy Afternoon (1936) as Philippe Martin |
| Starlit Days at the Lido (1935) as Self |
| The Gay Deception (1935) as Sandro |
| Romance in Manhattan (1934) as Karel Novak |
| The Pursuit of Happiness (1934) as Max Christmann |
| Man of Two Worlds (1934) as Aigo |
| Ihre Majestät die Liebe (1933) as Fred von Wellingen |
| Das Schicksal der Renate Langen (1931) as Gerd |
| Susanne macht Ordnung (1930) as Robert |
| Die große Sehnsucht (1930) as Himself |
| Fundvogel (1930) as Jan Bergwall |
| Der Detektiv des Kaisers (1930) as Dr. Wolfgang Crusius |
| Der Weg zur Schande (1930) as Boris Borrisoff |
| Atlantic (1929) as Peter |
| Maman Colibri (1929) as Georges de Chambry |
| Meineid (1929) as Karl Fenn |
| Die wunderbare Lüge der Nina Petrowna (1929) as Lt. Michael Rostof |
| Die Büchse der Pandora (1929) as Alwa Schön |
| Die seltsame Nacht der Helga Wangen (1928) as Werner Hilsoe |
| Zuflucht (1928) as Martin Falkhagen |