| Olteanu, Smaragda | Smaragda Olteanu | Actor | 1983 | 1 | |
| Oltedal, Martin Johannes, | Martin Johannes Oltedal | Actor | 2006 | 1 | |
| Oltersdorf, Erich, | Erich Oltersdorf | Actor | 1928 | 1 | |
| Olthy, Magda | Magda Olthy | Actor | 1939 | 1 | |
| Oltványi , Klára | Klára Oltványi | Costume Designer | 2005 | 1 | |
| Olty, Magda | Magda Olty | Actor | 1935 - 1941 | 2 | |
| Olvera, Viridiana | Viridiana Olvera | Actor | 2006 | 12 | |
| Olwagen, Christiaan | Christiaan Olwagen | Adaptation, Director | 2015 - 2016 | 4 | |
| Olympia Pagoulatou, Olympia | Olympia Pagoulatou | Actor | 2006 | 1 | |
| Olympios, Spyros | Spyros Olympios | Actor, Dancer | 1935 - 1997 | 10 | |
| Olympiou, Adia | Adia Olympiou | Actor | 2012 | 1 | |
| Oman, Bernarda | Bernarda Oman | Actor | 1992 - 2014 | 4 | |
| Oman, Julia , Trevelyan | Julia Trevelyan Oman | Designer | 1980 | 1 | |
| Oman, Timothy | Timothy Oman | Actor | 1972 | 1 | |
| Oman, Tine | Tine Oman | Actor | 1992 | 1 | |
| Omar, Ala | Ala Omar | Actor | 1990 | 1 | |
| Omar, Gumrah | Gumrah Omar | Director | 2019 | 1 | |
| Omar, Haval | Haval Omar | Lighting Designer | 1997 | 1 | |
| Omar, Hersh | Hersh Omar | Musician | 2013 - 2014 | 3 | |
| Omar, Nasra Ali, | Nasra Ali Omar | Musician | 2006 | 1 | |
| Omar, Sulekha Ali, | Sulekha Ali Omar | Choreographer, Dancer | 2008 - 2010 | 4 | |
| Ombuen, Gianfranco | Gianfranco Ombuen | Actor | 1969 | 2 | |
| Omdal, Adrian | Adrian Omdal | Actor | 2016 - 2017 | 2 | |
| Omdal, Leif | Leif Omdal | Actor | 1935 - 1956 | 4 | |
| Omdal, Odin Hørthe, | Odin Hørthe Omdal | Actor | 1995 - 1999 | 2 | |
| Omid, Arman | Arman Omid | Actor | 1999 | 1 | |
| Omidi, Elena | Elena Omidi | Actor | 2019 | 1 | |
| Omidi, Hossein | Hossein Omidi | Actor | 2013 | 1 | |
| Omland, Marit Pedersen, | Marit Pedersen Omland | Actor | 1993 | 6 | |
| Omland, Tone, | Tone Omland | Actor | 1996 - 2013 | 2 | |
| Omnéus, Göran | Göran Omnéus | Actor | 1976 | 2 | |
| Omodei, Raymond | Raymond Omodei | Designer, Director | 1974 - 2001 | 5 | |
| Omori, Naomi | Naomi Omori | Actor | 2010 | 1 | |
| Omoto, Luka | Luka Omoto | Actor | 2006 | 1 | |
| Omrani, Mohammad | Mohammad Omrani | Actor | 2006 | 1 | |
| Omundi, Geoffrey | Geoffrey Omundi | Actor | 2011 | 1 | |
| Omundson, Timothy | Timothy Omundson | Actor | 1990 | 1 | |
| Ona, Bjørn | Bjørn Ona | Actor | 1985 | 1 | |
| Onaityte, Jurate | Jurate Onaityte | Actor | 1998 - 2000 | 4 | |
| Onat, Cigdem | Cigdem Onat | Director | 2005 | 1 | |
| Onay, Yılmaz | Yılmaz Onay (Yilmaz Onay) | Translator | 2007 | 1 | |
| Ondeck, Chris | Chris Ondeck | Actor | 2020 | 1 | |
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