| Oittinen, Tytti, | Tytti Oittinen | Director | 1992 - 1994 | 2 | |
| Osterberger, -, | - Osterberger | Actor | 1971 | 2 | |
| Ovčinnikova, O. | O. Ovčinnikova | Actor | 1999 - 2000 | 2 | |
| Olenina, E. | E. Olenina | Dancer | 1999 - 2000 | 2 | |
| O'Brien, Dan | Dan O'Brien | Designer, Lighting Designer | 2008 | 2 | |
| Oanh, Tú | Tú Oanh | Actor | 2006 - 2010 | 2 | |
| O'Kane, Nancy | Nancy O'Kane | Actor | 1952 - 1961 | 2 | |
| Oitana, Ricky, | Ricky Oitana | Actor | 1996 | 2 | |
| O'Brien, James | James O'Brien | Actor | 1957 - 1971 | 2 | |
| O'Connell, Patricia | Patricia O'Connell | Actor | 1975 - 2000 | 2 | |
| Oosthout, Nelly, | Nelly Oosthout | Actor | 1928 - 1930 | 2 | |
| Oppenheim, Yoni | Yoni Oppenheim | Director, Producer | 2011 | 2 | |
| Oskui, Mahin | Mahin Oskui | Actor, Director | 1959 | 2 | |
| Otto, Erich, | Erich Otto | Actor | 1920 - 1921 | 2 | |
| O'Neill, Chris | Chris O'Neill | Designer, Lighting Designer | 2011 | 2 | |
| Oraker, Rutledge | Rutledge Oraker | Actor | 1932 | 2 | |
| Ogawa, Toshiro | Toshiro Ogawa | Lighting Designer | 1964 - 1981 | 2 | |
| O'Reilly, James | James O'Reilly | Actor | 1981 | 2 | |
| Otto, Herr, | Herr Otto | Actor, Director | 1878 | 2 | |
| Olin, Vilhelm, | Vilhelm Olin | Actor | 1886 - 1919 | 2 | |
| Ott, Mr., | Mr. Ott | Actor | 1889 | 2 | |
| Oberle, Thomas, | Thomas Oberle | Actor | 1891 - 1904 | 2 | |
| Olbrich, Irmgard, | Irmgard Olbrich | Actor | 1893 - 1901 | 2 | |
| Onorato, Mr., | Mr. Onorato | Actor | 1893 | 2 | |
| Olander, Albert, | Albert Olander | Actor | 1893 | 2 | |
| Oliver, Olive, | Olive Oliver | Actor | 1894 - 1904 | 2 | |
| Orling, O., | O. Orling | Designer | 1895 | 2 | |
| Ockert, Mr., | Mr. Ockert | Actor | 1898 - 1900 | 2 | |
| Owerłło, Paweł, | Paweł Owerłło | Actor | 1899 - 1905 | 2 | |
| Ormond, Margarethe, | Margarethe Ormond | Actor | 1900 - 1901 | 2 | |
| Olden, Hertha, | Hertha Olden | Actor | 1902 | 2 | |
| Oehlschläger, Anna, | Anna Oehlschläger | Actor | 1904 - 1908 | 2 | |
| Oberländer, Hans, | Hans Oberländer | Director | 1904 - 1908 | 2 | |
| Orth, Hubert, | Hubert Orth | Actor | 1916 - 1917 | 2 | |
| Oesterheld, Heinrich, | Heinrich Oesterheld | Actor | 1918 | 2 | |
| Orth, Frk., | Frk. Orth | Actor | 1918 | 2 | |
| Opitz, Felicitas, | Felicitas Opitz | Actor | 1918 - 1919 | 2 | |
| Otto-Morgenstern, Martina, | Martina Otto-Morgenstern | Actor | 1920 - 1921 | 2 | |
| Ott, Magdalena, | Magdalena Ott | Actor | 1919 | 2 | |
| Otto-Osmarr, Lili, | Lili Otto-Osmarr | Actor | 1920 | 2 | |
| Oldham, Michael, | Michael Oldham | Actor | 1942 - 1948 | 2 | |
| Orska, Alina(?), | Alina(?) Orska | Actor | 1901 - 1903 | 2 | |
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