| Osa, Sigbjørn, Bernhoft | Sigbjørn Bernhoft Osa | Actor | 1962 - 1965 | 4 | |
| Onsum, Per | Per Onsum | Actor | 1962 - 1965 | 4 | |
| Oldenbürger, Hans | Hans Oldenbürger | Actor | 1962 | 1 | |
| Ortmanns, Wolfram | Wolfram Ortmanns | Actor | 1962 | 1 | |
| Orthous, Pedro | Pedro Orthous | Director | 1962 | 1 | |
| Ocaranza, Ruben | Ruben Ocaranza | Actor | 1962 | 1 | |
| Ockel, Sigrid | Sigrid Ockel | Actor | 1962 | 1 | |
| Orea, Mario | Mario Orea | Actor | 1961 - 1963 | 2 | |
| Oberlin, Richard | Richard Oberlin | Actor | 1961 - 1963 | 4 | |
| O'Brien, Adale | Adale O'Brien | Actor | 1961 - 1962 | 2 | |
| Oligmüller, Kurt | Kurt Oligmüller | Actor | 1961 | 1 | |
| Orlemann, Philipp | Philipp Orlemann | Actor | 1961 | 1 | |
| O'Neill, Desmond | Desmond O'Neill | Actor | 1961 | 1 | |
| O'Connor, Boardman | Boardman O'Connor | Designer, Lighting Designer | 1961 | 2 | |
| Osborne, Virginia | Virginia Osborne | Actor | 1961 | 1 | |
| O'Riada, Sean | Sean O'Riada | Composer | 1961 | 1 | |
| O'Shannon, Finnuala | Finnuala O'Shannon | Actor | 1961 | 1 | |
| Olsson, Margareta | Margareta Olsson | Actor | 1961 | 1 | |
| Orreblad, Rune | Rune Orreblad | Actor | 1961 | 1 | |
| O'Shea, Milo | Milo O'Shea | Actor | 1961 | 1 | |
| Op de Beeck, Theo | Theo Op de Beeck | Actor | 1961 | 1 | |
| Ostermann, Lothar | Lothar Ostermann | Actor | 1960 - 1976 | 6 | |
| Ongjerth, Zsuzsanna | Zsuzsanna Ongjerth | Actor | 1960 | 1 | |
| Ongjerth, Richárd | Richárd Ongjerth | Actor | 1960 | 1 | |
| Oinass, Artūrs | Artūrs Oinass | Actor | 1960 | 1 | |
| Ost, Geoffrey | Geoffrey Ost | Producer | 1960 | 1 | |
| Oddone, Francesca | Francesca Oddone | Actor | 1960 | 1 | |
| 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 | |
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