| Oduwole, Andrew | Andrew Oduwole | Actor | 2011 | 12 | |
| Oduwole, Ayo | Ayo Oduwole | Actor | 2011 | 12 | |
| Otto-Körner, Margarethe, | Margarethe Otto-Körner | Actor | 1898 - 1929 | 13 | |
| Oppermann, Heinrich, | Heinrich Oppermann | Actor | 1895 - 1925 | 13 | |
| Orlamundt, Hans, | Hans Orlamundt | Actor | 1877 - 1880 | 13 | |
| Otis, Elita Proctor, | Elita Proctor Otis | Actor | 1903 | 13 | |
| Onetto, Elvira | Elvira Onetto | Actor | 2009 - 2011 | 13 | |
| Ozier, Laura | Laura Ozier | Mask Maker | 2000 - 2004 | 13 | |
| Okura, Shonosuke, | Shonosuke Okura | Actor | 2005 - 2013 | 14 | |
| Otto, Teo, | Teo Otto | Costume Designer, Designer, Director | 1934 - 1959 | 14 | |
| Olaussen, Gunhild Mathea, | Gunhild Mathea Olaussen | Actor | 1994 - 2000 | 14 | |
| Olstad, Svein, | Svein Olstad | Actor | 1999 - 2013 | 14 | |
| Oskam, Floor | Floor Oskam | Designer | 1991 - 1992 | 14 | |
| Odendahl, Florian | Florian Odendahl | Actor | 2004 | 14 | |
| Olsson, Bror, | Bror Olsson | Actor | 1877 - 1928 | 15 | |
| Osterloh, Hildegard, | Hildegard Osterloh | Actor | 1910 - 1916 | 15 | |
| Oliveira, Domingos, José Soares de | Domingos José Soares de Oliveira | Actor, Adaptation, Director, Lighting Designer, Sound Designer, Translator | 1983 - 1998 | 15 | |
| Ogawa, Keiko | Keiko Ogawa | Actor | 1999 - 2012 | 16 | |
| Orak, Aydin | Aydin Orak | Actor, Translator | 2010 | 16 | 2 |
| Olbrich, Julius, | Julius Olbrich | Actor | 1876 - 1910 | 16 | |
| Oe, Yoshihiko | Yoshihiko Oe | Dramaturg | 2010 | 16 | |
| Ozora, Mayumi | Mayumi Ozora | Actor | 2010 | 16 | |
| Olohan, John | John Olohan | Actor | 1980 | 16 | |
| O'Hanlon, Máire | Máire O'Hanlon | Actor | 1980 | 16 | |
| Olsen, Hans, | Hans Olsen | Actor | 1902 - 1903 | 17 | |
| Olsen, Ole, | Ole Olsen | Actor, Composer | 1895 - 1922 | 18 | 1 |
| Ottesen, Rasmus, | Rasmus Ottesen | Actor | 1902 - 1926 | 18 | |
| Oenslager, Donald, | Donald Oenslager | Costume Designer, Designer, Lighting Designer | 1934 - 1951 | 19 | |
| Occhini, Ilaria | Ilaria Occhini | Actor | 1981 - 2005 | 19 | |
| Odasso, Cristina | Cristina Odasso | Actor | 2005 - 2006 | 19 | |
| Olsen, Arne, Thomas | Arne Thomas Olsen | Actor, Director | 1955 - 1963 | 19 | |
| Otto, Alex, | Alex Otto | Actor, Director, Playwright | 1898 - 1934 | 21 | |
| Ousdal, Mads, | Mads Ousdal | Actor | 1993 - 2020 | 21 | 3 |
| Ones, Arvid, | Arvid Ones | Actor, Director | 1983 - 2004 | 22 | |
| Osmarr, Otto, | Otto Osmarr | Actor, Director | 1889 - 1919 | 23 | |
| O'Neil, Nance, | Nance O'Neil | Actor | 1900 - 1917 | 23 | |
| Olstad, Even, | Even Olstad | Actor | 2000 - 2016 | 25 | |
| Olsen, Tyler | Tyler Olsen | Actor | 2006 | 25 | |
| Orloff, Ida, | Ida Orloff | Actor | 1905 - 1942 | 26 | |
| Orvelius, Gunilla | Gunilla Orvelius | Actor | 1992 - 2002 | 27 | |
| Oredsson, Thomas | Thomas Oredsson | Actor | 1975 - 1997 | 27 | |
| Otten, Marcel | Marcel Otten | Translator | 2012 - 2013 | 29 | |
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