| Oikonomopoulou, Pepi | Pepi Oikonomopoulou | Adaptation, Director | 2006 | 2 | |
| Oikonomou, Michalis | Michalis Oikonomou | Actor | 2012 | 1 | |
| Oikonomou, Thodoris | Thodoris Oikonomou | Composer, Musician | 2007 - 2020 | 2 | |
| Oikonomou, Thomas | Thomas Oikonomou | Actor, Director | 1902 - 1926 | 121 | |
| Oimori, Reiko | Reiko Oimori | Actor | 1992 | 1 | |
| Oinass, Artūrs | Artūrs Oinass | Actor | 1960 | 1 | |
| Oitana, Ricky | Ricky Oitana | Actor | 1996 | 2 | |
| Oittinen, Tytti | Tytti Oittinen | Director | 1992 - 1994 | 2 | 1 |
| Oja, Andres | Andres Oja | Actor | 2001 - 2010 | 2 | |
| Oja, Tõnu | Tõnu Oja | Actor | 2007 - 2022 | 2 | 1 |
| Oja, Totti | Totti Oja | Actor | 2008 | 1 | |
| Ojala, Timo | Timo Ojala | Director | 1985 | 1 | |
| Ojamaa, Pekka | Pekka Ojamaa | Costume Designer, Designer | 1990 - 2001 | 9 | |
| Ojanen, Laura | Laura Ojanen | Actor | 2005 | 1 | 1 |
| Ojea, Paca | Paca Ojea | Actor | 2001 | 1 | |
| Ojeda, Oscar | Oscar Ojeda | Actor | 2013 | 1 | |
| Ojrzyńska, Marta | Marta Ojrzyńska | Actor | 2011 | 1 | |
| Oka, Mizuho | Mizuho Oka | Actor | 1928 | 1 | |
| Okada, Ai | Ai Okada | Actor | 1998 | 1 | |
| Okada, Inosuke | Inosuke Okada | Lighting Designer | 1934 | 1 | |
| Okada, Kazuo | Kazuo Okada | Director, Musical Director | 1969 - 1978 | 2 | |
| Okada, Saburonosuke | Saburonosuke Okada | Designer | 1909 | 1 | |
| Okada, Shu | Shu Okada | Actor | 1936 | 1 | |
| Okada, Yoko | Yoko Okada | Actor | 1997 | 1 | |
| Okada, Yoshihiro | Yoshihiro Okada | Actor | 1999 - 2006 | 2 | |
| Okada, Yu | Yu Okada | Sound Designer | 2009 | 1 | |
| Okadigwe, Mary | Mary Okadigwe | Actor | 2002 | 1 | |
| Okafor, Amaka | Amaka Okafor | Actor | 2020 - 2023 | 2 | |
| Okafor, Barnabas | Barnabas Okafor | Actor | 2002 | 1 | |
| Okafor, Kosy | Kosy Okafor | Actor | 2002 | 1 | |
| Okafor, Stella | Stella Okafor | Lighting Designer | 2009 | 1 | |
| Okafor, Stella C | Stella C Okafor | Dancer | 2002 | 1 | |
| Okafor, Stella O | Stella O Okafor | Dancer | 2002 | 1 | |
| Okajima, Yuki | Yuki Okajima | Lighting Designer | 2014 | 1 | |
| Okakura, Shiro | Shiro Okakura | Director | 1953 | 1 | |
| Okamoto, Kennichi | Kennichi Okamoto | Actor | 1990 | 1 | |
| Okamura, Akemi | Akemi Okamura | Dramaturg | 2013 | 1 | |
| Okamura, Fumio | Fumio Okamura | Actor | 1923 | 1 | |
| Okano, Kazuo | Kazuo Okano | Translator | 1959 | 1 | |
| Okawa, Tamaki | Tamaki Okawa (Ōkawa Tamaki / 大川珠季) | Dramaturg, Translator | 2024 | 2 | |
| Okazaki, Kazuhiko | Kazuhiko Okazaki | Actor | 2002 | 1 | |
| Okazaki, Koji | Koji Okazaki | Designer | 1999 | 1 | |
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