Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Actor | To Be or Not to Be | 1942 | SS-Gruppenführer Ehrhardt |
| Actor | A Night at the Opera | 1935 | Gottlieb |
| Actor | Ninotchka | 1939 | Comrade Iranoff |
| Actor | Stalag 17 | 1953 | Sgt. Johann Sebastian Schulz |
| Actor | A Day at the Races | 1937 | Dr. Leopold X. Steinberg |
| Actor | Only Angels Have Wings | 1939 | Dutchy |
| Actor | The Fortune Cookie | 1966 | Professor Winterhalter |
| Actor | House of Frankenstein | 1944 | Burgomeister Hussman |
| Actor | Heidi | 1937 | Police Captain |
| Actor | The Song of Bernadette | 1943 | Louis Bouriette |
| Actor | Tarzan Triumphs | 1943 | Sergeant |
| Actor | A Night in Casablanca | 1946 | Count Pfefferman / Heinrich Stubel |
| Actor | The Glenn Miller Story | 1954 | W. Kranz |
| Actor | Houdini | 1953 | Schultz |
| Actor | The Errand Boy | 1961 | Baron Elston Carteblanche |
| Actor | O. Henry's Full House | 1952 | The Gift of the Magi: Menkie |
| Actor | Nothing Sacred | 1937 | Dr. Emil Eggelhoffer (as Sig Rumann) |
| Actor | That Uncertain Feeling | 1941 | Monsieur Kafka |
| Actor | It Happened Tomorrow | 1944 | Mr. Beckstein |
| Actor | The Wings of Eagles | 1957 | Manager |
| Actor | The World in His Arms | 1952 | General Ivan Vorashilov |
| Actor | Comrade X | 1940 | Emil Von Hofer |
| Actor | Living It Up | 1954 | Dr. Emile Egelhofer |
| Actor | This Woman Is Mine | 1941 | John Jacob Astor |