| Name | Functions | Event Dates  | Events | Resources | ||
|---|---|---|---|---|---|---|
| Lampros Orfanos | Costume Designer, Designer | 1943 | 2 | |||
| Michael Oldham | Actor | 1942 - 1948 | 2 | |||
| Norman Olson | Actor | 1942 | 1 | |||
| Frk. Oppi | Actor | 1941 | 1 | |||
| Zdeněk Otava | Actor | 1941 | 1 | |||
| Frank Overton | Actor | 1941 | 1 | |||
| Isa Ostrow | Actor | 1941 | 1 | 1 | ||
| Philip Orth | Actor | 1940 | 2 | |||
| Xenia Orrell | Actor | 1940 | 1 | |||
| Alice O'Connell | Actor | 1940 | 2 | |||
| Muriel O'Leary | Actor | 1940 | 1 | |||
| Gust Ongyerth | Director | 1940 | 1 | |||
| Sally O'Neil | Actor | 1939 | 1 | |||
| Otto Osterwalder | Musician | 1939 | 1 | |||
| Magda Olthy | Actor | 1939 | 1 | |||
| Hans Ohloff | Actor | 1939 | 1 | |||
| Benita Ozoliņa | Actor | 1939 | 1 | |||
| Daniel Oudet | Actor | 1939 | 1 | |||
| Leanore O'Connor | Actor | 1939 | 1 | |||
| Alen Opgaard | Designer | 1939 | 1 | |||
| Gustav Opgaard | Designer | 1939 | 1 | |||
| John Opgaard | Actor, Designer | 1939 | 2 | |||
| Vivian Opgaard | Actor | 1939 | 1 | |||
| Carleton Opgaard | Actor | 1939 | 1 | |||
| Clarice Olson | Actor | 1939 | 1 | |||
| Ardell Olson | Actor | 1939 | 1 | |||
| Rosella Opgaard | Actor | 1939 | 1 | |||
| Jørn Ording | Actor, Director | 1938 - 1978 | 69 | 1 | ||
| Joseph Olney | Actor | 1938 | 1 | |||
| Olga Overlack | Actor | 1938 | 1 | |||
| Günther Oppel | Actor | 1938 | 1 | |||
| Otto Ornelli | Choreographer | 1938 | 1 | |||
| Reinhold Olszewski | Actor | 1938 | 1 | |||
| Lynn E. Orr | Designer, Director, Lighting Designer | 1937 | 3 | |||
| Nina Oulianine | Dancer | 1937 | 1 | |||
| Anders Orbeck | Translator | 1936 - 2018 | 3 | 1 | ||
| Axsel Oswald | Actor | 1936 - 1937 | 2 | |||
| Ota Ohrenstein | Actor | 1936 | 1 | |||
| Audrey O'Flyn | Actor | 1936 | 2 | |||
| Shu Okada | Actor | 1936 | 1 | |||
| Brita Olin | Actor | 1936 | 1 | |||
| Ruth Wynn Owen | Actor | 1936 | 1 | |||