| Osman Sozi | Sozi Osman | Actor | 1997 | 1 | |
| Oslo, in | in Oslo (in Oslo) | | | | |
| Oskui, Mahin | Mahin Oskui (Mahin Oskui) | Actor, Director | 1959 | 2 | |
| Oskar, Otto | Otto Oskar | Actor | 1898 - 1916 | 12 | |
| Oskam, Peter | Peter Oskam | Costume Designer, Designer | 1985 | 2 | |
| Oskam, Floor | Floor Oskam | Designer | 1991 - 1992 | 14 | |
| Osjord, Elin | Elin Osjord (Elin Osjord) | Actor | 1991 | 1 | |
| Osis, K. | K. Osis (K. Osis) | Actor | 1916 | 1 | |
| Osis, Jānis | Jānis Osis | Actor, Director | 1921 - 1943 | 5 | |
| Osipovič, Jakov | Jakov Osipovič | Actor | 1926 | 1 | |
| Osipova, Nadežda | Nadežda Osipova | Designer | 2016 | 1 | |
| Osiński, Szymon | Szymon Osiński | Actor | 2007 | 4 | |
| Osinski, Aurélien | Aurélien Osinski | Actor | 2000 - 2004 | 78 | |
| Osian, Matte | Matte Osian | Actor | 2001 | 1 | |
| Oshry, Joseph, P. | Joseph P. Oshry | Lighting Designer | 2012 | 1 | |
| Oshima, Akiko | Akiko Oshima | Dramaturg | 2009 | 1 | |
| Osgood, Erin | Erin Osgood | Actor | 2006 | 1 | |
| Osgood, Dylan | Dylan Osgood | Musician | 2018 | 1 | |
| Oseng, Ellen | Ellen Oseng | Costume Designer, Designer | 2009 | 2 | |
| Osen, Leif | Leif Osen (Leif Osen) | Musician | 2009 | 1 | |
| Ose, Victoria | Victoria Ose | Actor | 2020 | 2 | |
| Oschmann, Robert | Robert Oschmann | Actor | 2016 | 1 | |
| Oschlag, Jakob | Jakob Oschlag | Adaptation, Director | 1977 - 2001 | 8 | |
| Oščepkov, Artur | Artur Oščepkov | Choreographer | 2013 | 1 | |
| Oscarsson, Ulrika | Ulrika Oscarsson | Actor, Musician | 2001 | 3 | |
| Oscarsson, Per | Per Oscarsson | Actor | 1950 - 1997 | 4 | |
| Oscarsson, Kjell | Kjell Oscarsson | Actor | 1990 | 2 | |
| Oscarson, Stina | Stina Oscarson | Musician | 1997 | 1 | |
| Oscàr, Martin | Martin Oscàr (Martin Oscàr) | Actor | 1914 | 1 | |
| Oscar, Henry | Henry Oscar (Henry Oscar) | Actor, Director, Producer | 1930 - 1947 | 5 | |
| Oscar, Harry | Harry Oscar (Harry Oscar) | Director | 1900 | 1 | |
| Oscar, - | - Oscar (- Oscar) | Choreographer | 2006 | 1 | |
| Osca, Isabel | Isabel Osca | Actor | 2001 | 5 | |
| Osburn, Nathan | Nathan Osburn | Actor | 2011 | 2 | |
| Osbourne, Lynne | Lynne Osbourne (Lynne Osbourne) | Actor | 2000 | 1 | |
| Osbourne, Jessica | Jessica Osbourne | Director | 2013 | 1 | |
| Osborne, Virginia | Virginia Osborne | Actor | 1961 | 1 | |
| Osborne, Si | Si Osborne (Si Osborne) | Actor | 2001 | 2 | |
| Osborne, Nina | Nina Osborne | Actor | 1912 | 1 | |
| Osborne, Max | Max Osborne | Actor | 2004 | 1 | |
| Osborne, Kipp | Kipp Osborne | Actor | 1976 | 1 | |
| Osborne, John | John Osborne | Adaptation, Translator | 1972 - 2011 | 8 | |
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