| O'Connor, Savannah | Savannah O'Connor (Savannah O'Connor) | Actor | 2002 | 1 | |
| Oppi, Frk. | Frk. Oppi (Frk. Oppi) | Actor | 1941 | 1 | |
| O'Neil, Sally | Sally O'Neil (Sally O'Neil) | Actor | 1939 | 1 | |
| O'Brien, Peter | Peter O'Brien (Peter O'Brien) | Actor | 2002 | 1 | |
| O'Connell Bak, Dennis | Dennis O'Connell Bak (Dennis O'Connell Bak) | Actor | 2006 | 1 | |
| Ongjerth, Richárd | Richárd Ongjerth (Richárd Ongjerth) | Actor | 1960 | 1 | |
| Oanh, Tú | Tú Oanh (Tú Oanh) | Actor | 2006 - 2010 | 2 | |
| O'Foghludha, Michael | Michael O'Foghludha (Michael O'Foghludha) | Actor | 2001 | 1 | |
| O'Kane, Nancy | Nancy O'Kane (Nancy O'Kane) | Actor | 1952 - 1961 | 2 | |
| Olesen, Maggie | Maggie Olesen (Maggie Olesen) | Actor | 1971 | 1 | |
| O'Callaghan, Brenainn | Brenainn O'Callaghan (Brenainn O'Callaghan) | Actor | 2000 | 1 | |
| Oitana, Ricky | Ricky Oitana (Ricky Oitana) | Actor | 1996 | 2 | |
| O'Brien, James | James O'Brien (James O'Brien) | Actor | 1957 - 1971 | 2 | |
| O'Connell, Patricia | Patricia O'Connell (Patricia O'Connell) | Actor | 1975 - 2000 | 2 | |
| Oosthout, Nelly | Nelly Oosthout (Nelly Oosthout) | Actor | 1928 - 1930 | 2 | |
| O'Connell, Carol | Carol O'Connell (Carol O'Connell) | Actor | 1963 | 1 | |
| Opffer, Yvonne | Yvonne Opffer (Yvonne Opffer) | Actor | 1987 | 1 | |
| Oze, Toshiko | Toshiko Oze (Toshiko Oze) | Actor | 1968 | 1 | |
| Orzechowska, Jolanta | Jolanta Orzechowska (Jolanta Orzechowska) | Actor | 1983 | 1 | |
| Osterwianka, Elżbieta | Elżbieta Osterwianka (Elżbieta Osterwianka) | Actor | 1973 | 1 | |
| Otto, Wilhelm | Wilhelm Otto | Actor | 1889 - 1898 | 5 | |
| Orlandini, C. | C. Orlandini (C. Orlandini) | Actor | 1891 - 1892 | 3 | |
| Oenicke, Christa | Christa Oenicke (Christa Oenicke) | Actor | 1958 | 1 | |
| O'Donnell, Beatrice | Beatrice O'Donnell (Beatrice O'Donnell) | Actor | 1981 | 1 | |
| Orlova, Lubov | Lubov Orlova (Lubov Orlova) | Actor | 1959 | 1 | |
| Olenin, B. | B. Olenin (B. Olenin) | Actor | 1959 | 1 | |
| O'Brien, Jaye | Jaye O'Brien (Jaye O'Brien) | Actor | 1957 | 1 | |
| Oest, Johann Adam | Johann Adam Oest (Johann Adam Oest) | Actor | 1977 - 2004 | 4 | |
| Otupacca, Alessandro | Alessandro Otupacca (Alessandro Otupacca) | Actor | 2011 | 1 | |
| Osbourne, Lynne | Lynne Osbourne (Lynne Osbourne) | Actor | 2000 | 1 | |
| Otto-Körner, Margarethe | Margarethe Otto-Körner (Margarethe Otto-Körner) | Actor | 1898 - 1929 | 13 | |
| Orneallas, David | David Orneallas (David Orneallas) | Actor | 2011 | 1 | |
| Odilon, Helene | Helene Odilon (Helene Odilon) | Actor | 1894 | 1 | |
| Oliver, Michael | Michael Oliver (Michael Oliver) | Actor | 2011 | 1 | 1 |
| Orloff, Ida | Ida Orloff (Ida Orloff) | Actor | 1905 - 1942 | 26 | |
| Otto, Erich | Erich Otto (Erich Otto) | Actor | 1920 - 1921 | 2 | |
| Ofori-Attah, Rhoda | Rhoda Ofori-Attah (Rhoda Ofori-Attah) | Actor | 2011 | 1 | |
| O'Grady, Frank | Frank O'Grady (Frank O'Grady) | Actor | 1932 | 1 | |
| Oliveira, Joice | Joice Oliveira (Joice Oliveira) | Actor | 1945 | 1 | |
| O'Grady, Chris | Chris O'Grady (Chris O'Grady) | Actor | 2011 | 1 | |
| O'Grady, Sorcha | Sorcha O'Grady (Sorcha O'Grady) | Actor | 2011 | 1 | |
| Ottenheimer, Albert M. | Albert M. Ottenheimer (Albert M. Ottenheimer) | Actor | 1932 - 1936 | 4 | |
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