| O´Byrne, Louis | Louis O´Byrne | Designer | 1991 | 1 | |
| Ormsby, Robert | Robert Ormsby | Actor | 1991 | 1 | |
| Olsen, Trevor H. | Trevor H. Olsen | Actor | 1991 | 1 | |
| Obermann, Frank | Frank Obermann | Actor | 1991 | 1 | |
| Okazaki, Shinobu | Shinobu Okazaki | Designer | 1991 | 1 | |
| Ohsawa, Kaoru | Kaoru Ohsawa | Lighting Designer | 1991 | 1 | |
| Obrecht, Urs | Urs Obrecht | Actor | 1991 | 1 | |
| Oskam, Floor | Floor Oskam | Designer | 1991 - 1992 | 14 | |
| Overbeeke, Adri | Adri Overbeeke | Actor | 1991 - 1992 | 84 | |
| Olsoni, Kristin | Kristin Olsoni | Assistant Director | 1991 - 2006 | 2 | |
| Obermüller, Ulrike | Ulrike Obermüller | Costume Designer | 1991 - 2016 | 2 | |
| Ostendorf, Josef | Josef Ostendorf | Actor | 1991 - 2016 | 8 | |
| Ouedraogo, Marceline | Marceline Ouedraogo | Actor | 1992 | 1 | |
| Olszewski, Zbigniew | Zbigniew Olszewski | Actor | 1992 | 2 | |
| Oman, Tine | Tine Oman | Actor | 1992 | 1 | |
| Olivere, Marc | Marc Olivere | Lighting Designer | 1992 | 1 | |
| Otto, Gabriele | Gabriele Otto | Dramaturg | 1992 | 1 | |
| Oosthoek, Peter | Peter Oosthoek | Actor | 1992 | 1 | |
| Ospelt, Ingo | Ingo Ospelt | Actor | 1992 | 1 | |
| Olich, Michael | Michael Olich | Costume Designer | 1992 | 1 | |
| Ozoliņa, Lilita | Lilita Ozoliņa | Actor | 1992 | 1 | |
| Otto, Annie | Annie Otto | Actor | 1992 | 1 | |
| Oimori, Reiko | Reiko Oimori | Actor | 1992 | 1 | |
| Ouwehand, Roos | Roos Ouwehand | Actor | 1992 | 1 | |
| Offermans, Sylvia | Sylvia Offermans | Actor | 1992 | 1 | |
| Ohla, Johannes | Johannes Ohla | Mask Maker | 1992 | 1 | |
| Oittinen, Tytti | Tytti Oittinen (Tytti Oittinen) | Director | 1992 - 1994 | 2 | |
| Op gen Orth, Helga | Helga Op gen Orth | Actor, Adaptation, Director | 1992 - 1996 | 4 | |
| Ottmann, Anna | Anna Ottmann | Actor | 1992 - 2000 | 3 | |
| Orvelius, Gunilla | Gunilla Orvelius | Actor | 1992 - 2002 | 27 | |
| Okun, Alexander | Alexander Okun (Alexander Okun) | Designer | 1992 - 2003 | 3 | |
| Ottesen, Rigmor | Rigmor Ottesen (Rigmor Ottesen) | Actor | 1992 - 2007 | 32 | |
| Ottesen, Per | Per Ottesen (Per Ottesen) | Actor | 1992 - 2013 | 36 | |
| Oman, Bernarda | Bernarda Oman | Actor | 1992 - 2014 | 4 | |
| Ohmori, Kikuyo | Kikuyo Ohmori (Kikuyo Ohmori) | Actor | 1993 | 1 | |
| Orchis, Isella | Isella Orchis (Isella Orchis) | Actor | 1993 | 2 | |
| Ormond, Claire | Claire Ormond (Claire Ormond) | Actor | 1993 | 1 | |
| Ouyoung, Juliet | Juliet Ouyoung (Juliet Ouyoung) | Costume Designer | 1993 | 1 | |
| O'Kelly, Geri | Geri O'Kelly (Geri O'Kelly) | Choreographer | 1993 | 1 | |
| Omland, Marit Pedersen | Marit Pedersen Omland (Marit Pedersen Omland) | Actor | 1993 | 6 | |
| O'Neill, Dean | Dean O'Neill (Dean O'Neill) | Actor | 1993 | 1 | |
| O'Keeffe, Lorraine | Lorraine O'Keeffe (Lorraine O'Keeffe) | Actor | 1993 | 1 | |
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