| Orbán, Attila | Attila Orbán | Actor | 2008 | 5 | |
| Okukawa, Koji | Koji Okukawa | Actor | 2008 - 2010 | 5 | |
| Ollinger, Eduard | Eduard Ollinger | Lighting Designer | 2010 - 2012 | 5 | |
| Orawiec, Irena | Irena Orawiec | Actor | 2014 | 5 | |
| Owen, George | George Owen | Actor | 1911 - 1912 | 5 | |
| Ortman, Anders | Anders Ortman | Composer | 2020 | 5 | |
| Oliver, Federico | Federico Oliver | Director | 1902 - 1908 | 5 | |
| Ocano, Armando | Armando Ocano | Adaptation | 1975 - 1980 | 5 | |
| Ohland, Hans | Hans Ohland | Costume Designer, Designer | 1963 - 1981 | 4 | |
| Olsson, Lennart | Lennart Olsson | Director | 1971 - 1987 | 4 | 1 |
| Orchis, Isella | Isella Orchis | Actor | 1993 - 2013 | 4 | |
| Orlik, Stanisław | Stanisław Orlik | Actor | 1904 - 1924 | 4 | |
| Outin, Régis | Régis Outin | Actor | 1928 - 1978 | 4 | 1 |
| Owen, Marianne | Marianne Owen | Actor | 1978 - 1996 | 4 | |
| Oest, Johann Adam | Johann Adam Oest | Actor | 1977 - 2004 | 4 | 1 |
| Ottenheimer, Albert M. | Albert M. Ottenheimer | Actor | 1932 - 1936 | 4 | |
| Opsvig, Virginia | Virginia Opsvig | Costume Designer, Mask Maker | 1931 - 1936 | 4 | |
| Oster, Teresina | Teresina Oster | Actor | 1906 - 1909 | 4 | |
| Olivetti, Alessia | Alessia Olivetti | Actor | 2008 - 2011 | 4 | |
| Otrembowa, Julia | Julia Otrembowa | Actor, Translator | 1883 - 1899 | 4 | |
| Olin, Vilhelm | Vilhelm Olin | Actor, Director | 1886 - 1919 | 4 | 1 |
| Ostheim, Minna | Minna Ostheim | Actor | 1900 - 1908 | 4 | |
| Olsen, Hanns | Hanns Olsen | Actor | 1921 - 1931 | 4 | |
| Ormonde, Eugene | Eugene Ormonde | Actor | 1900 - 1904 | 4 | |
| Orliński, Janusz | Janusz Orliński | Actor | 1903 - 1909 | 4 | |
| Ottolini, Piero | Piero Ottolini | Translator | 1905 - 1906 | 4 | 1 |
| Olasz, Pál | Pál Olasz | Actor | 1906 - 1908 | 4 | |
| Omar, Sulekha Ali | Sulekha Ali Omar | Choreographer, Dancer | 2008 - 2010 | 4 | |
| Olerud, Ingeborg S. | Ingeborg S. Olerud | Lighting Designer | 2008 - 2010 | 4 | |
| Olsen, Thale Kvam | Thale Kvam Olsen | Costume Designer, Designer | 2013 | 4 | |
| Orford, Cathleen | Cathleen Orford | Actor | 1913 - 1918 | 4 | |
| Ottesen, Oscar | Oscar Ottesen | Lighting Designer | 1954 - 1971 | 4 | |
| Ostałowska, Dominika | Dominika Ostałowska | Actor | 2005 - 2006 | 4 | |
| Onaityte, Jurate | Jurate Onaityte | Actor | 1998 - 2000 | 4 | |
| Ogilvie, Michael | Michael Ogilvie | Actor | 1978 - 1982 | 4 | |
| Ognjanović, Aleksandar | Aleksandar Ognjanović | Director | 1955 - 1979 | 4 | |
| Ogasawara, Yoshitomo | Yoshitomo Ogasawara | Actor | 1976 - 1990 | 4 | |
| Okking, Jens | Jens Okking | Actor | 1979 - 1984 | 4 | 1 |
| O`Brien-Moore, Erin | Erin O'Brien-Moore | Actor | 1923 - 1956 | 4 | |
| O'Donnell, Patricia | Patricia O'Donnell | Actor | 1981 | 4 | 1 |
| Oman, Bernarda | Bernarda Oman | Actor | 1992 - 2014 | 4 | |
| O'Connor, Joanna | Joanna O'Connor | Actor | 2007 - 2021 | 4 | 1 |
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