| Oleś, Bartłomiej Brat | Bartłomiej Brat Oleś | Composer | 2006 - 2009 | 7 | |
| O'Connell, Caitlin | Caitlin O'Connell | Actor | 2006 - 2009 | 2 | |
| Ohba, Ai | Ai Ohba | Actor | 2006 - 2009 | 2 | |
| Oanh, Tú | Tú Oanh | Actor | 2006 - 2010 | 2 | |
| Olofson, Anna | Anna Olofson | Mask Maker | 2006 - 2010 | 58 | |
| Oliver, Barbara | Barbara Oliver | Actor, Director | 2006 - 2010 | 3 | |
| Ottesen, Marian Saastad | Marian Saastad Ottesen | Actor | 2006 - 2021 | 11 | 2 |
| Oftebro, Jakob | Jakob Oftebro | Actor | 2006 - 2022 | 5 | |
| Opstad, Eva Cathrine | Eva Cathrine Opstad | Designer | 2007 | 1 | |
| Olszewska, Jolanta | Jolanta Olszewska | Actor | 2007 | 2 | |
| Osiński, Szymon | Szymon Osiński | Actor | 2007 | 4 | |
| Ovčinnikov, Jurij | Jurij Ovčinnikov | Actor | 2007 | 1 | |
| Oswald, Karin | Karin Oswald | Actor, Adaptation | 2007 | 2 | |
| Oxlade, Jonathon | Jonathon Oxlade | Costume Designer, Designer | 2007 | 2 | |
| Orth, Franz | Franz Orth | Actor | 2007 | 3 | |
| Olariu, Stelian | Stelian Olariu | Conductor | 2007 | 1 | |
| Onay, Yılmaz | Yılmaz Onay (Yilmaz Onay) | Translator | 2007 | 1 | |
| Orhun, Emine | Emine Orhun | Actor | 2007 | 1 | |
| Ochránek, Marcel | Marcel Ochránek | Actor | 2007 - 2008 | 2 | |
| Orella, Francesc | Francesc Orella | Actor | 2007 - 2013 | 11 | |
| Oikonomou, Thodoris | Thodoris Oikonomou | Composer, Musician | 2007 - 2020 | 2 | |
| O'Connor, Joanna | Joanna O'Connor | Actor | 2007 - 2021 | 4 | 1 |
| Oja, Tõnu | Tõnu Oja | Actor | 2007 - 2022 | 2 | 1 |
| O'Brien, Dan | Dan O'Brien | Designer, Lighting Designer | 2008 | 2 | |
| Olsson, Tove | Tove Olsson | Actor | 2008 | 10 | 2 |
| Ogawa, Ikuo | Ikuo Ogawa | Lighting Designer | 2008 | 1 | |
| Oakenleaf, Fingal | Fingal Oakenleaf | Actor | 2008 | 1 | |
| Oaten, James | James Oaten | Actor | 2008 | 1 | |
| Orbán, Attila | Attila Orbán | Actor | 2008 | 5 | |
| O'Connor, Isabell, Monk | Isabell Monk O'Connor | Actor | 2008 | 1 | |
| O'Neill, Michelle | Michelle O'Neill | Actor | 2008 | 3 | |
| Ozoliņš, Aigars | Aigars Ozoliņš | Designer | 2008 | 1 | |
| O'Brien, Barret | Barret O'Brien | Actor | 2008 | 1 | |
| Oja, Totti | Totti Oja | Actor | 2008 | 1 | |
| Ortolani, Philip | Philip Ortolani | Actor | 2008 | 1 | |
| Olesen, Ninna | Ninna Olesen | Costume Designer | 2008 | 1 | |
| O'Shaughnessy, Fiona | Fiona O'Shaughnessy | Actor | 2008 | 2 | |
| Oberheide, Alex | Alex Oberheide | Actor | 2008 | 1 | |
| O'Shea, Ryan | Ryan O'Shea | Actor | 2008 | 1 | |
| O´Valle, Violet | Violet O´Valle | Director | 2008 | 1 | |
| Obi, Christopher | Christopher Obi | Actor | 2008 | 2 | |
| Otte, Charles | Charles Otte | Director | 2008 | 1 | |
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