| Name | Functions | Event Dates  | Events | Resources | ||
|---|---|---|---|---|---|---|
| Iñaki Otxoa | Actor | 1987 | 1 | |||
| Franco Olivero | Actor | 1986 - 1987 | 3 | |||
| Hans Oppliger | Actor | 1986 | 1 | |||
| Luboš Ogoun | Choreographer | 1986 | 1 | |||
| Hilde Olausson | Actor, Musician | 1985 - 2015 | 8 | 3 | ||
| Uwe Oelkers | Costume Designer, Designer | 1985 - 2010 | 7 | |||
| Bodil Ousdal | Choreographer | 1985 - 1991 | 6 | |||
| Trygve Olsen | Lighting Designer | 1985 - 1987 | 3 | 1 | ||
| Dag Eirik Orbakk | Actor | 1985 | 2 | |||
| Rosmarie Oechslin | Actor | 1985 | 2 | |||
| Kirsti Otsamo | Actor | 1985 | 1 | |||
| Timo Ojala | Director | 1985 | 1 | |||
| Susanne Oechsner | Actor | 1985 | 3 | |||
| Aideen O'Kelly | Actor | 1985 | 1 | |||
| Ann O´Driscoll | Director, Lighting Designer | 1985 | 2 | |||
| L'ubica Obuchová | Costume Designer | 1985 | 1 | 1 | ||
| Mariken Overdijk | Actor | 1985 | 1 | |||
| Peter Oskam | Costume Designer, Designer | 1985 | 2 | |||
| John Ryker O'Hara | Actor | 1985 | 2 | |||
| Lucille O'Flanagan | Actor | 1985 | 1 | |||
| Laurian Oniga | Designer | 1985 | 3 | |||
| Bjørn Ona | Actor | 1985 | 1 | |||
| Christopher Oden | Actor, Director | 1984 - 2001 | 6 | 1 | ||
| Francoise Oriane | Actor | 1984 | 1 | |||
| Danuše Ondráčková | Actor | 1984 | 2 | |||
| Matthew O'Sullivan | Actor | 1984 | 1 | |||
| Alexej Okuněv | Actor | 1984 | 1 | |||
| Judith Olauson | Actor | 1984 | 1 | 1 | ||
| Michael O'Flaherty | Musical Director | 1984 | 1 | |||
| Denis O'Hare | Actor | 1984 | 1 | |||
| Jan-Erik Ohlson | Actor | 1984 | 1 | |||
| Hidemi Ohsaka | Actor | 1984 | 1 | |||
| Steve Otton | Assistant Director | 1984 | 1 | |||
| Sverre Anker Ousdal | Actor | 1983 - 2020 | 40 | 1 | ||
| Henning Olesen | Actor | 1983 - 2010 | 3 | 1 | ||
| Richard Ooms | Actor | 1983 - 2008 | 10 | 1 | ||
| Matthias Oelrich | Actor | 1983 - 2006 | 3 | |||
| Arvid Ones | Actor, Director | 1983 - 2004 | 22 | 1 | ||
| Domingos José Soares de Oliveira | Actor, Adaptation, Director, Lighting Designer, Sound Designer, Translator | 1983 - 1998 | 15 | |||
| Taisto-Bertil Orsmaa | Adaptation, Director | 1983 - 1996 | 3 | 1 | ||
| Thomas Otto | Actor | 1983 - 1993 | 12 | |||
| Jolanta Orzechowska | Actor | 1983 | 1 | |||