| Oudrey, Pierre | Pierre Oudrey | Actor | 1973 | 1 | |
| Ohgitani, Kunio | Kunio Ohgitani | Director | 1980 | 1 | |
| Oenslager, Donald | Donald Oenslager | Costume Designer, Designer, Lighting Designer | 1934 - 1951 | 19 | |
| Olney, Joseph | Joseph Olney | Actor | 1938 | 1 | |
| Ozerova, E A | E A Ozerova | Actor | 1907 | 1 | |
| Orloff, Nicholas | Nicholas Orloff | Actor | 1908 | 1 | |
| Osmanov, Bahram | Bahram Osmanov | Director | 2006 | 1 | |
| Olsen, Inga | Inga Olsen | Actor | 1877 - 1908 | 101 | |
| Ohmori, Kikuyo | Kikuyo Ohmori | Actor | 1993 | 1 | |
| Ohberg, Åke | Åke Ohberg | Actor | 1954 | 1 | |
| Otten, Geeske | Geeske Otten | Dramaturg | 2006 | 3 | |
| Ohnemus, Chris | Chris Ohnemus | Dramaturg | 1999 - 2000 | 2 | |
| Oberkogler, Cornelia | Cornelia Oberkogler | Actor | 1959 | 1 | |
| Oberska, Irena | Irena Oberska | Actor | 1958 | 1 | |
| Obzyna, Gertrude | Gertrude Obzyna | | | | |
| Oddvar, August | August Oddvar | Actor | 1900 - 1954 | 108 | |
| Odstrčilová, Liběna | Liběna Odstrčilová | Actor | 1919 - 1932 | 6 | |
| Oelkers, Uwe | Uwe Oelkers | Costume Designer, Designer | 1985 - 2010 | 7 | |
| Oesch, Ditta | Ditta Oesch | Actor | 1944 | 1 | |
| Off, Marcus | Marcus Off | Actor | 2002 | 1 | |
| Ogasawara, Makoto | Makoto Ogasawara | Sound Designer | 1997 | 1 | |
| Ogawa, Keiko | Keiko Ogawa | Actor | 1999 - 2012 | 16 | |
| Ogletree, Kathrine | Kathrine Ogletree | Costume Designer | 2003 | 1 | |
| Ohland, Hans | Hans Ohland | Costume Designer, Designer | 1963 - 1981 | 4 | |
| Ohlin, Jonas | Jonas Ohlin | Actor | 1999 | 1 | |
| Ohtake, Shinobu | Shinobu Ohtake | Actor | 1991 | 1 | |
| Oikonomopoulou, Pepi | Pepi Oikonomopoulou | Adaptation, Director | 2006 | 2 | |
| Ojamaa, Pekka | Pekka Ojamaa | Costume Designer, Designer | 1990 - 2001 | 9 | |
| Oka, Mizuho | Mizuho Oka | Actor | 1928 | 1 | |
| Okopiński, Marek | Marek Okopiński | Actor | 1958 | 1 | |
| Okornicki, Kazimierz | Kazimierz Okornicki | Actor, Director | 1908 - 1922 | 7 | |
| Okraska, Paweł | Paweł Okraska | Actor | 1999 | 1 | |
| Okun, Alexander | Alexander Okun | Designer | 1992 - 2003 | 3 | |
| Okura, Shonosuke | Shonosuke Okura | Actor | 2005 - 2013 | 14 | |
| Olchowska, (Nuna) Młodziejowska | (Nuna) Młodziejowska Olchowska | Actor | 1905 - 1907 | 2 | |
| Olderkjær, Stian | Stian Olderkjær | Actor | 2006 | 1 | |
| Olenicki, Manfred | Manfred Olenicki | Actor | 1995 - 1998 | 3 | |
| Oleś, Marcin | Marcin Oleś | Composer | 2006 - 2009 | 7 | |
| Olivar, César | César Olivar | Costume Designer | 2004 | 1 | |
| Ollén, Gunnar | Gunnar Ollén | Adaptation | 1947 - 2005 | 2 | |
| Olschansky, Aage | Aage Olschansky | Actor | 1981 | 1 | |
| Olsen, Augusta | Augusta Olsen | Actor | 1907 | 10 | |
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