| Name | Functions | Event Dates | Events | Resources | ||
|---|---|---|---|---|---|---|
| Francoise Oriane | Actor | 1984 | 1 | |||
| Benedetta Ori | Actor | 1999 | 2 | |||
| Emine Orhun | Actor | 2007 | 1 | |||
| Coşkun Orhon | Actor | 1965 - 1971 | 2 | |||
| Vasile Ioan Orheian | Actor | 2009 | 1 | |||
| Jaanus Orgulas | Actor | 1962 - 1989 | 2 | |||
| Paul Orgill | Actor | 1973 | 1 | |||
| Alex Organ | Actor, Sound Designer | 2002 | 2 | |||
| Yehiel Orgal | Lighting Designer | 1995 | 1 | |||
| Cathleen Orford | Actor | 1913 - 1918 | 4 | |||
| Lampros Orfanos | Costume Designer, Designer | 1943 | 2 | |||
| Stelios Orfanidis | Designer | 1949 | 1 | |||
| Želimir Orešković | Director | 1975 - 1989 | 3 | 1 | ||
| Sarah Orenstein | Actor | 2004 | 1 | 1 | ||
| Joan Orenstein | Actor | 1981 - 1991 | 3 | |||
| C. Orendy | Actor | 1920 - 1928 | 3 | |||
| Francesc Orella | Actor | 2007 - 2013 | 11 | |||
| Heinrich Orell | Actor, Director | 1911 | 2 | |||
| Thomas Oredsson | Actor | 1975 - 1997 | 27 | |||
| Mario Orea | Actor | 1961 - 1963 | 2 | |||
| Władysława Ordonówna | Actor | 1904 | 1 | |||
| María Ordóñez | Actor | 2023 | 1 | |||
| Jørn Ording | Actor, Director | 1938 - 1978 | 69 | 1 | ||
| Janina Ordężanka | Actor | 1911 | 1 | |||
| Lee Ordeman | Actor | 2012 | 1 | 4 | ||
| Mieczysława Orczyńska | Actor | 1911 | 1 | |||
| Odette Orczy | Actor | 1931 | 1 | |||
| Charles Orck | Actor | 1970 | 1 | |||
| Sylvie Orcier | Designer | 2004 - 2005 | 9 | |||
| Fabien Orcier | Actor | 2004 - 2005 | 72 | |||
| Cendrine Orcier | Actor | 2004 - 2005 | 63 | |||
| Walter Orchowski | Actor | 1906 | 1 | |||
| Isella Orchis | Actor | 1993 - 2013 | 4 | |||
| Yvonne Q. Orchardson | Actor | 1913 | 1 | |||
| Mandy Orchard | Actor | 2018 | 1 | |||
| Lisa Orberg | Actor | 1974 | 1 | |||
| Anders Orbeck | Translator | 1936 - 2018 | 3 | 1 | ||
| Peter Orban | Lighting Designer | 2011 | 8 | |||
| Levente Orbán | Actor | 2016 | 2 | |||
| György Orbán | Composer | 1972 - 2002 | 2 | 1 | ||
| Attila Orbán | Actor | 2008 | 5 | |||
| Dag Eirik Orbakk | Actor | 1985 | 2 | |||