| Obradovic, Daniel | Daniel Obradovic | Actor | 1956 | 1 | |
| Oboshi, Ebele | Ebele Oboshi | Actor | 2002 | 1 | |
| Oborotov, Yuri | Yuri Oborotov | Actor | 2012 | 2 | |
| Obonya, Hanns | Hanns Obonya | Actor | 1935 | 1 | |
| Obolensky, Chloé | Chloé Obolensky | Designer | 2011 | 1 | 1 |
| Oblokar, Samo | Samo Oblokar | Lighting Designer | 2010 - 2012 | 3 | |
| Obinu, Gianfranco Onatziro | Gianfranco Onatziro Obinu | Actor | 2015 - 2019 | 3 | |
| Obino, Tetsushi | Tetsushi Obino | Actor | 1978 | 1 | |
| Obino, Kinji | Kinji Obino | Actor | 1978 | 1 | |
| Obi, Christopher | Christopher Obi | Actor | 2008 | 2 | |
| Oberwalder, Lisl | Lisl Oberwalder | Actor | 1958 - 1962 | 2 | |
| Oberton , Michael | Michael Oberton | Actor | 2023 | 1 | |
| Oberthür, Martina | Martina Oberthür | Actor | 1989 | 4 | |
| Oberthür, Charles | Charles Oberthür | Composer | 1880 | 1 | |
| Obert, Gerti | Gerti Obert | Actor | 1935 | 1 | |
| Oberska, Irena | Irena Oberska | Actor | 1958 | 1 | |
| Oberschlick, Gerhard | Gerhard Oberschlick | Dramaturg | 1975 | 1 | |
| Oberndorfer, Siegfrid | Siegfrid Oberndorfer | Actor | 1896 | 1 | |
| Obermüller, Ulrike | Ulrike Obermüller | Costume Designer | 1991 - 2016 | 2 | |
| Obermüller, Hans | Hans Obermüller | Actor | 1971 - 1981 | 6 | |
| Obermeier, Hermann | Hermann Obermeier | Actor | 1958 | 1 | |
| Obermann, Frank | Frank Obermann | Actor | 1991 | 1 | |
| Obermaierová, Jaroslava | Jaroslava Obermaierová | Actor | 1972 - 2006 | 2 | |
| Obermaier, Marta | Marta Obermaier | Actor | 1947 | 1 | |
| Oberlin, Richard | Richard Oberlin | Actor | 1961 - 1963 | 4 | |
| Oberlin, Karen | Karen Oberlin | Actor | 1995 | 1 | |
| Oberlin, Dorothy | Dorothy Oberlin | Actor | 1945 | 1 | |
| Oberlik, Katharina | Katharina Oberlik | Actor | 2006 | 1 | |
| Oberle, Thomas | Thomas Oberle | Actor | 1891 - 1904 | 2 | |
| Oberle, Carl-Friedrich | Carl-Friedrich Oberle | Costume Designer, Designer | 1994 | 2 | |
| Oberländer, Horst | Horst Oberländer | Actor | 1949 | 1 | |
| Oberländer, Heinrich | Heinrich Oberländer | Actor | 1891 | 1 | |
| Oberländer, Hans | Hans Oberländer | Director | 1904 - 1908 | 2 | |
| Oberkogler, David | David Oberkogler | Actor | 2000 | 1 | |
| Oberkogler, Cornelia | Cornelia Oberkogler | Actor | 1959 | 1 | 1 |
| Oberholz, Dieter | Dieter Oberholz | Actor | 1993 - 2004 | 3 | |
| Oberhofer, - | - Oberhofer | Actor | 1906 | 1 | |
| Oberhof, Valerie | Valerie Oberhof | Actor | 2002 - 2012 | 6 | 1 |
| Oberhof, Johannes | Johannes Oberhof | Actor | 1972 | 2 | |
| Oberheide, Alex | Alex Oberheide | Actor | 2008 | 1 | |
| Oberhäußer, Frank | Frank Oberhäußer | Assistant Director | 2006 | 1 | |
| Oberhauser, Kendra | Kendra Oberhauser | Actor | 2012 | 1 | |
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