| Orzechowski, Kevin | Kevin Orzechowski | Actor | 2001 | 1 | |
| Os'minin, Aleksej | Aleksej Os'minin | Actor | 1999 | 1 | |
| Osa, Liv Bernhoft | Liv Bernhoft Osa | Actor | 1993 - 2020 | 10 | 3 |
| Osa, Sigbjørn, Bernhoft | Sigbjørn Bernhoft Osa | Actor | 1962 - 1965 | 4 | |
| Osako, Koji | Koji Osako (大迫浩二) | Lighting Designer | 2023 | 2 | |
| Osanai, Kaoru | Kaoru Osanai | Director | 1909 - 1928 | 6 | 1 |
| Osanai, Minako | Minako Osanai | Actor | 1968 | 1 | |
| Osato, Sono | Sono Osato | Actor | 1951 | 1 | |
| Ošavkova, Sonja | Sonja Ošavkova (Соња Ошавкова) | Actor | 2013 | 1 | |
| Osazuwa, Evelyn, Rasmussen | Evelyn Rasmussen Osazuwa | Actor, Composer | 2018 - 2019 | 4 | |
| Osborn, Andrew | Andrew Osborn | Actor | 1951 | 1 | |
| Osborn, Elmar | Elmar Osborn | Actor | 1955 | 1 | |
| Osborn, Sally | Sally Osborn | Actor | 1975 | 1 | |
| Osborne, Collin | Collin Osborne | Actor | 2013 | 1 | |
| Osborne, Dana | Dana Osborne | Costume Designer | 2011 | 1 | |
| Osborne, Dorithy | Dorithy Osborne | Actor | 1943 | 1 | |
| Osborne, Duncan | Duncan Osborne | Actor | 1989 | 1 | |
| Osborne, Eunice | Eunice Osborne | Actor | 1926 | 1 | |
| Osborne, Janet | Janet Osborne | Actor | 2004 | 1 | |
| Osborne, John | John Osborne | Adaptation, Translator | 1972 - 2011 | 8 | 1 |
| Osborne, Kipp | Kipp Osborne | Actor | 1976 | 1 | 1 |
| Osborne, Max | Max Osborne | Actor | 2004 | 1 | |
| Osborne, Nina | Nina Osborne | Actor | 1912 | 1 | |
| Osborne, Si | Si Osborne | Actor | 2001 | 2 | |
| Osborne, Virginia | Virginia Osborne | Actor | 1961 | 1 | |
| Osbourne, Jessica | Jessica Osbourne | Director | 2013 | 1 | |
| Osbourne, Lynne | Lynne Osbourne | Actor | 2000 | 1 | |
| Osburn, Nathan | Nathan Osburn | Actor | 2011 | 2 | |
| Osca, Isabel | Isabel Osca | Actor | 2001 | 5 | |
| Oscar, - | - Oscar | Choreographer | 2006 | 1 | |
| Oscar, Harry | Harry Oscar | Director | 1900 | 1 | |
| Oscar, Henry | Henry Oscar | Actor, Director, Producer | 1930 - 1947 | 5 | |
| Oscàr, Martin | Martin Oscàr | Actor | 1914 | 1 | |
| Oscarson, Stina | Stina Oscarson | Musician | 1997 | 1 | |
| Oscarsson, Kjell | Kjell Oscarsson | Actor | 1990 | 2 | |
| Oscarsson, Per | Per Oscarsson | Actor | 1950 - 1997 | 4 | |
| Oscarsson, Ulrika | Ulrika Oscarsson | Actor, Musician | 2001 | 3 | |
| Oščepkov, Artur | Artur Oščepkov | Choreographer | 2013 | 1 | |
| Oschlag, Jakob | Jakob Oschlag | Adaptation, Director | 1977 - 2001 | 8 | 1 |
| Oschmann, Robert | Robert Oschmann | Actor | 2016 | 1 | |
| Ose, Victoria | Victoria Ose | Actor | 2020 | 2 | |
| Osen, Leif | Leif Osen | Musician | 2009 | 1 | |
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