| Orsborn, Lura | Lura Orsborn | Actor | 1928 | 1 | |
| Ortiz, Natalia | Natalia Ortiz | Actor | 1929 | 1 | |
| Országhová, Olga B. | Olga B. Országhová | Actor | 1929 | 1 | |
| Orczyńska, Mieczysława | Mieczysława Orczyńska | Actor | 1911 | 1 | |
| Olsson, Åsa | Åsa Olsson (Olsson, Aasa) | Actor | 1970 | 1 | |
| Olsen, Lauritz | Lauritz Olsen | Actor | 1911 | 1 | |
| Orck, Charles | Charles Orck | Actor | 1970 | 1 | |
| O'Callaghan, Maurice | Maurice O'Callaghan | Actor | 1972 | 1 | |
| Osborne, Nina | Nina Osborne | Actor | 1912 | 1 | |
| O'Neill, Norman | Norman O'Neill | Composer | 1913 | 1 | |
| Orchardson, Yvonne Q. | Yvonne Q. Orchardson | Actor | 1913 | 1 | |
| Ostrowsky, Hartmut | Hartmut Ostrowsky | Director | 1975 | 1 | |
| Orr, Terence | Terence Orr | Sound Designer | 1975 | 1 | |
| Owen, Brett | Brett Owen | Actor | 1979 | 1 | |
| Ostrowicz, Kazimierz | Kazimierz Ostrowicz | Actor | 1975 | 1 | |
| Osborn, Sally | Sally Osborn | Actor | 1975 | 1 | |
| Opaker, Eva | Eva Opaker | Actor | 1973 | 1 | 1 |
| Oglesby, Marshall | Marshall Oglesby | Director | 1973 | 1 | |
| O' Mahony, Tom | Tom O' Mahony | Actor | 1979 | 1 | |
| Otto, Bailey | Bailey Otto | Designer | 2014 | 1 | |
| Osborne, Kipp | Kipp Osborne | Actor | 1976 | 1 | 1 |
| O'Brien, Sylvia | Sylvia O'Brien | Actor | 1981 | 1 | |
| O´Neill, Noel | Noel O´Neill | Actor | 1979 | 1 | |
| Olivares, Erica | Erica Olivares | Actor | 1976 | 1 | |
| Olsen, Otto | Otto Olsen | Actor | 1913 | 1 | |
| Outram, J., F. | J. F. Outram | Actor | 1913 | 1 | |
| Otterström, Birger | Birger Otterström | Actor | 1914 | 1 | |
| Olson, Shelly | Shelly Olson | Actor | 1981 | 1 | |
| Olsson, Frk. | Frk. Olsson | Actor | 1919 | 1 | |
| Ouředník, František | František Ouředník | Actor | 1920 | 1 | |
| Ozols-Heins, Jānis | Jānis Ozols-Heins | Actor | 1921 | 1 | |
| O'Dwyer, Katherine | Katherine O'Dwyer | Actor | 1922 | 1 | |
| Okamura, Fumio | Fumio Okamura | Actor | 1923 | 1 | |
| Oligmüller, Kurt | Kurt Oligmüller | Actor | 1961 | 1 | |
| Oakeshott, W., F. | W. F. Oakeshott | Actor | 1925 | 1 | |
| Oldland, Lilian | Lilian Oldland | Actor | 1925 | 1 | |
| Otis, Charles | Charles Otis | Actor | 1925 | 1 | |
| Ollikainen, Anna-Maija | Anna-Maija Ollikainen | Actor | 1981 | 1 | |
| Oman, Timothy | Timothy Oman | Actor | 1972 | 1 | |
| Olson, Selmer | Selmer Olson | Actor | 1927 | 1 | |
| Offerman, Jr., George | George Offerman, Jr. | Actor | 1927 | 1 | |
| O'Dea, Dysart | Dysart O'Dea | Actor | 1928 | 1 | |
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