| Name | Functions | Event Dates  | Events | Resources | ||
|---|---|---|---|---|---|---|
| Eyvind Olsen | Musician | 1976 | 1 | |||
| Barney O'Sullivan | Actor | 1976 - 1980 | 2 | |||
| Yoshitomo Ogasawara | Actor | 1976 - 1990 | 4 | |||
| Rania Oikonomidou | Actor | 1976 - 2004 | 7 | |||
| Kari Onstad | Actor | 1976 - 2018 | 60 | 6 | ||
| Corrado Olmi | Actor | 1977 - 1978 | 8 | |||
| Thomas Oglesby | Actor | 1977 - 1980 | 2 | 1 | ||
| Stephen Oliver | Composer | 1977 - 1983 | 9 | |||
| Jakob Oschlag | Adaptation, Director | 1977 - 2001 | 8 | 1 | ||
| Johann Adam Oest | Actor | 1977 - 2004 | 4 | 1 | ||
| Ingunn Olsen | Actor | 1978 | 1 | |||
| Edgar Meyer Olsen | Sound Designer | 1978 | 2 | |||
| Steinar Ofsdal | Musician | 1978 | 38 | 1 | ||
| Michiko Ohtsuka | Actor | 1978 | 1 | |||
| Kinji Obino | Actor | 1978 | 1 | |||
| Tetsushi Obino | Actor | 1978 | 1 | |||
| Yachiyo Ohtori | Actor | 1978 | 1 | |||
| Anne Oostveen | Actor | 1978 | 1 | |||
| Michael Ogilvie | Actor | 1978 - 1982 | 4 | |||
| Hisako Ohkata | Actor | 1978 - 1983 | 2 | |||
| Georges Ourth | Actor, Director | 1978 - 1984 | 2 | |||
| Helli Ohnesorge | Actor | 1978 - 1986 | 2 | |||
| Robert Ornbo | Lighting Designer | 1978 - 1987 | 2 | 1 | ||
| Marianne Owen | Actor | 1978 - 1996 | 4 | |||
| Sándor Oszter | Actor | 1978 - 2007 | 2 | 1 | ||
| Kirsten Olesen | Actor | 1978 - 2011 | 12 | 2 | ||
| Anne Marie Ottersen | Actor | 1978 - 2014 | 7 | 1 | ||
| Diane Orr | Actor | 1979 | 1 | |||
| Brett Owen | Actor | 1979 | 1 | |||
| Tom O' Mahony | Actor | 1979 | 1 | |||
| Noel O´Neill | Actor | 1979 | 1 | |||
| Jens Okking | Actor | 1979 - 1984 | 4 | 1 | ||
| Kunio Ohgitani | Director | 1980 | 1 | |||
| Shinji Ogawa | Actor | 1980 | 1 | |||
| Linda Oug | Actor | 1980 | 1 | |||
| Brian O'Donoghue | Lighting Designer | 1980 | 1 | |||
| Paul O'Brien | Actor | 1980 | 1 | |||
| Julia Trevelyan Oman | Designer | 1980 | 1 | |||
| Julia Odegard | Actor | 1980 | 1 | |||
| John Olohan | Actor | 1980 | 16 | |||
| Máire O'Hanlon | Actor | 1980 | 16 | |||
| Grischa Ostrovski | Director | 1980 | 1 | |||