| Orlović, Mara | Mara Orlović | Actor | 1933 | 1 | |
| Orlović, Milan | Milan Orlović | Actor | 1933 | 1 | |
| Orlova, Olga | Olga Orlova | Actor | 1933 | 1 | |
| Ottenheimer, Albert M. | Albert M. Ottenheimer | Actor | 1932 - 1936 | 4 | |
| O'Grady, Frank | Frank O'Grady | Actor | 1932 | 1 | |
| Oraker, Rutledge | Rutledge Oraker | Actor | 1932 | 2 | |
| Ospenskaya, Maria | Maria Ospenskaya | Actor | 1932 | 1 | |
| Ondra, Tilde | Tilde Ondra | Actor | 1932 | 1 | |
| Otto, Asta | Asta Otto | Actor | 1932 | 1 | |
| Onslow, Alexander | Alexander Onslow | Actor | 1932 | 1 | |
| Olinger, T. Lawrence | T. Lawrence Olinger | Actor | 1932 | 1 | |
| Opsvig, Virginia | Virginia Opsvig | Costume Designer, Mask Maker | 1931 - 1936 | 4 | |
| Ott, Günther | Günther Ott | Actor | 1931 | 1 | |
| Orczy, Odette | Odette Orczy | Actor | 1931 | 1 | |
| Oppenheimer, Albert, M. | Albert M. Oppenheimer | Actor | 1931 | 2 | |
| Orning, Margit | Margit Orning | Actor | 1931 | 1 | |
| Occhelli, P. | P. Occhelli | Designer | 1931 | 1 | |
| Oscar, Henry | Henry Oscar | Actor, Director, Producer | 1930 - 1947 | 5 | |
| Orme, Michael | Michael Orme | Director, Producer | 1930 - 1936 | 5 | |
| Oates, Cicely | Cicely Oates | Actor | 1930 | 3 | |
| Olsen, Oscar | Oscar Olsen | Actor | 1930 | 1 | |
| Ollila, Yrjö | Yrjö Ollila | Costume Designer, Designer | 1930 | 2 | |
| Otto, Hans | Hans Otto | Actor | 1929 | 1 | |
| Ortiz, Natalia | Natalia Ortiz | Actor | 1929 | 1 | |
| Országhová, Olga B. | Olga B. Országhová | Actor | 1929 | 1 | |
| Ostertag, Bernard | Bernard Ostertag | Actor | 1929 | 1 | |
| O'Lochlainn, Gearoid | Gearoid O'Lochlainn | Actor, Translator | 1928 - 2009 | 2 | |
| Outin, Régis | Régis Outin | Actor | 1928 - 1978 | 4 | |
| Oosthout, Nelly | Nelly Oosthout | Actor | 1928 - 1930 | 2 | |
| Ortiz, Esperanza | Esperanza Ortiz | Actor | 1928 - 1929 | 9 | |
| Oka, Mizuho | Mizuho Oka | Actor | 1928 | 1 | |
| Oszke, - | - Oszke | Actor | 1928 | 1 | |
| Ondra, - | - Ondra | Actor | 1928 | 1 | |
| Oltersdorf, Erich | Erich Oltersdorf | Actor | 1928 | 1 | |
| Olsen, L. Katherine | L. Katherine Olsen | Actor | 1928 | 1 | |
| Oen, Einar | Einar Oen | Actor | 1928 | 1 | |
| Obreschkov, - | - Obreschkov | Actor | 1928 | 1 | |
| Orsborn, Lura | Lura Orsborn | Actor | 1928 | 1 | |
| O'Dea, Dysart | Dysart O'Dea | Actor | 1928 | 1 | |
| Outler, Walter | Walter Outler | Actor | 1928 | 2 | |
| Oftedahl, Ole | Ole Oftedahl | Actor, Dancer | 1928 | 2 | |
| Olsen, Gudrun | Gudrun Olsen | Dancer | 1928 | 1 | |
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