| Name | Functions | Event Dates | Events  | Resources | ||
|---|---|---|---|---|---|---|
| Michael Orme | Director, Producer | 1930 - 1936 | 5 | |||
| Henry Oscar | Actor, Director, Producer | 1930 - 1947 | 5 | |||
| Wilhelm Otto | Actor | 1889 - 1898 | 5 | |||
| Frk. Olsen | Actor | 1874 - 1876 | 5 | |||
| Pēteris Ozoliņš | Actor, Director | 1889 - 1912 | 5 | |||
| Fritz Odemar | Actor, Director | 1893 - 1934 | 5 | |||
| Frank Ostwald | Actor | 1917 - 1937 | 5 | |||
| Warner Oland | Actor | 1906 - 1908 | 5 | 1 | ||
| Jakob Oftebro | Actor | 2006 - 2022 | 5 | 1 | ||
| Tonny Olsen | Actor | 1918 - 1924 | 5 | |||
| Lia Orlandini | Actor | 1921 - 1922 | 5 | |||
| Arne H. Olsen | Lighting Designer | 1971 - 1978 | 5 | |||
| Raymond Omodei | Designer, Director | 1974 - 2001 | 5 | |||
| Alekos Oudinotis | Actor | 1975 - 1985 | 5 | |||
| Herbert Olschok | Director | 1988 - 2014 | 5 | |||
| Monika Orthofer | Actor | 1981 | 5 | |||
| Jānis Osis | Actor, Director | 1921 - 1943 | 5 | |||
| Charlie Otte | Actor | 1983 | 5 | |||
| Isabel Osca | Actor | 2001 | 5 | |||
| Baard Owe | Actor | 1964 - 2007 | 5 | |||
| Mark O´Regan | Actor | 1988 | 5 | |||
| Aksel Orav | Actor | 1962 - 1997 | 5 | |||
| Ruth Olsén | Actor | 1995 | 5 | |||
| Fran Overbury | Actor, Musical Director | 2001 | 5 | |||
| Attila Orbán | Actor | 2008 | 5 | |||
| Koji Okukawa | Actor | 2008 - 2010 | 5 | |||
| Eduard Ollinger | Lighting Designer | 2010 - 2012 | 5 | |||
| Irena Orawiec | Actor | 2014 | 5 | |||
| George Owen | Actor | 1911 - 1912 | 5 | |||
| Anders Ortman | Composer | 2020 | 5 | |||
| Federico Oliver | Director | 1902 - 1908 | 5 | |||
| Armando Ocano | Adaptation | 1975 - 1980 | 5 | |||
| Liběna Odstrčilová | Actor | 1919 - 1932 | 6 | |||
| Elisabeth Orth | Actor | 1971 - 1995 | 6 | |||
| Deirdre O'Connell | Actor, Director | 1971 - 1985 | 6 | |||
| Joan O'Clery | Costume Designer | 2000 - 2013 | 6 | 1 | ||
| E. Orling | Designer | 1895 - 1896 | 6 | |||
| M. Ol'čeva | Actor | 1900 - 1924 | 6 | |||
| Albert Olsen | Actor | 1901 | 6 | |||
| Kaoru Osanai | Director | 1909 - 1928 | 6 | 1 | ||
| Bodil Ousdal | Choreographer | 1985 - 1991 | 6 | |||
| Marit Pedersen Omland | Actor | 1993 | 6 | |||