| Oldfield, Vivienne | Vivienne Oldfield | Producer | 1960 | 1 | |
| Ottosen, Carl | Carl Ottosen | Actor | 1960 | 1 | |
| O'Brien, Joseph | Joseph O'Brien | Actor | 1960 | 1 | |
| Oberkogler, Cornelia | Cornelia Oberkogler | Actor | 1959 | 1 | 1 |
| Orlova, Lubov | Lubov Orlova | Actor | 1959 | 1 | |
| Olenin, B. | B. Olenin | Actor | 1959 | 1 | |
| Oskui, Mahin | Mahin Oskui | Actor, Director | 1959 | 2 | 1 |
| Otenbacher, Margot | Margot Otenbacher | Actor | 1959 | 1 | |
| Olsen, Oliver | Oliver Olsen | Costume Designer | 1959 | 2 | |
| Oliver, Norman | Norman Oliver | Actor | 1959 | 2 | |
| Ogborn, Jane | Jane Ogborn | Actor | 1959 | 1 | |
| Okano, Kazuo | Kazuo Okano | Translator | 1959 | 1 | |
| O'Dea, Maureen | Maureen O'Dea | Actor | 1959 | 1 | |
| Olinescu, Boris | Boris Olinescu | Actor, Assistant Director | 1959 | 2 | |
| Obzina, Martin | Martin Obzina | Director | 1959 | 1 | |
| Oberwalder, Lisl | Lisl Oberwalder | Actor | 1958 - 1962 | 2 | |
| Oberska, Irena | Irena Oberska | Actor | 1958 | 1 | |
| Okopiński, Marek | Marek Okopiński | Actor | 1958 | 1 | |
| Otto, Wilfried | Wilfried Otto | Designer | 1958 | 1 | |
| Oenicke, Christa | Christa Oenicke | Actor | 1958 | 1 | |
| Olárová, Renata | Renata Olárová | Actor | 1958 | 1 | 1 |
| Opsahl, Arve | Arve Opsahl | Actor | 1958 | 1 | |
| Obermeier, Hermann | Hermann Obermeier | Actor | 1958 | 1 | |
| O'Brien, James | James O'Brien | Actor | 1957 - 1971 | 2 | |
| Otto, Pavel | Pavel Otto | Actor | 1957 | 1 | |
| O'Brien, Jaye | Jaye O'Brien | Actor | 1957 | 1 | |
| Ostaszewska, Krystyna | Krystyna Ostaszewska | Actor | 1957 | 1 | |
| Olafsdottir, Karin | Karin Olafsdottir | Actor | 1957 | 1 | |
| Olsson, Jöran | Jöran Olsson | Actor | 1957 | 1 | |
| Ohlsson, Fredrik | Fredrik Ohlsson | Actor | 1957 | 3 | |
| Olason, Ragnar | Ragnar Olason | Actor | 1956 - 1973 | 48 | |
| Oosterwijk, Nora | Nora Oosterwijk | Actor | 1956 - 1957 | 3 | |
| Ornäs, Gustaf Hiort, af | Gustaf Hiort af Ornäs | Actor | 1956 | 1 | |
| Olarin (Olaru?), Mircea | Mircea Olarin (Olaru?) | Actor | 1956 | 1 | |
| Obradovic, Daniel | Daniel Obradovic | Actor | 1956 | 1 | |
| Overhoff, Ilde | Ilde Overhoff | Actor | 1956 | 1 | |
| Ovaska, Sulo | Sulo Ovaska | Actor, Designer | 1956 | 2 | |
| Orlikowsky, Wazlaw | Wazlaw Orlikowsky | Adaptation, Choreographer, Director | 1956 | 3 | 1 |
| Oy, Necmi | Necmi Oy | Actor | 1956 | 2 | |
| Opsahl, Svein, Eirik | Svein Eirik Opsahl | Actor | 1956 | 2 | |
| O'Hara, Audrey | Audrey O'Hara | Actor | 1956 | 1 | |
| O'Donnell, Carolyn | Carolyn O'Donnell | Dancer | 1956 | 1 | |
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