| Olason, Ragnar | Ragnar Olason | Actor | 1956 - 1973 | 48 | |
| Oelschlegel, Vera | Vera Oelschlegel | Director | 1997 - 2000 | 52 | |
| Ostendorf, Nils | Nils Ostendorf | Composer | 2008 - 2014 | 54 | 1 |
| Otto, Harald | Harald Otto | Actor, Director | 1896 - 1922 | 55 | 1 |
| Olsen, Ragnar | Ragnar Olsen | Adaptation, Translator | 1994 - 2018 | 58 | 1 |
| Olofson, Anna | Anna Olofson | Mask Maker | 2006 - 2010 | 58 | |
| Onstad, Kari | Kari Onstad | Actor | 1976 - 2018 | 60 | 6 |
| Orcier, Cendrine | Cendrine Orcier | Actor | 2004 - 2005 | 63 | |
| Opsann, Aksel | Aksel Opsann | Actor | 1900 - 1928 | 66 | |
| Oggenfuss, Michael | Michael Oggenfuss | Designer, Lighting Designer | 2002 - 2004 | 66 | 1 |
| Ording, Jørn | Jørn Ording | Actor, Director | 1938 - 1978 | 69 | 1 |
| Orcier, Fabien | Fabien Orcier | Actor | 2004 - 2005 | 72 | |
| Osinski, Aurélien | Aurélien Osinski | Actor | 2000 - 2004 | 78 | |
| Overbeeke, Adri | Adri Overbeeke | Actor | 1991 - 1992 | 84 | |
| Opstad, Cathrine Gåre | Cathrine Gåre Opstad | Costume Designer | 2005 - 2008 | 90 | |
| Olsen, Lars Reynert | Lars Reynert Olsen | Actor | 2005 - 2008 | 90 | |
| Oftebro, Nils Ole | Nils Ole Oftebro | Actor | 1970 - 2018 | 92 | 1 |
| Ozier, Frédéric | Frédéric Ozier | Actor | 2000 - 2018 | 93 | |
| Olsen, Inga | Inga Olsen | Actor | 1877 - 1908 | 101 | 1 |
| Oddvar, August | August Oddvar | Actor | 1900 - 1954 | 108 | 1 |
| Oikonomou, Thomas | Thomas Oikonomou | Actor, Director | 1902 - 1926 | 121 | |
| Otnes, Ola | Ola Otnes | Actor | 1981 - 2020 | 128 | 3 |
| Opstad, Peder | Peder Opstad | Actor, Adaptation, Director, Producer | 2005 - 2010 | 183 | |
| Olram, Gunnar | Gunnar Olram | Actor | 1943 - 2006 | 187 | 1 |
| Ostermeier, Thomas | Thomas Ostermeier | Adaptation, Director, Translator | 2002 - 2024 | 232 | |
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