| Off, Marcus | Marcus Off | Actor | 2002 | 1 | |
| Ogasawara, Makoto | Makoto Ogasawara | Sound Designer | 1997 | 1 | |
| Ogletree, Kathrine | Kathrine Ogletree | Costume Designer | 2003 | 1 | |
| Ohlin, Jonas | Jonas Ohlin | Actor | 1999 | 1 | |
| Ohtake, Shinobu | Shinobu Ohtake | Actor | 1991 | 1 | |
| Oka, Mizuho | Mizuho Oka | Actor | 1928 | 1 | |
| Okopiński, Marek | Marek Okopiński | Actor | 1958 | 1 | |
| Okraska, Paweł | Paweł Okraska | Actor | 1999 | 1 | |
| Olderkjær, Stian | Stian Olderkjær | Actor | 2006 | 1 | |
| Olivar, César | César Olivar | Costume Designer | 2004 | 1 | |
| Olschansky, Aage | Aage Olschansky | Actor | 1981 | 1 | |
| Ongjerth, Zsuzsanna | Zsuzsanna Ongjerth | Actor | 1960 | 1 | |
| Ono, Masutaro | Masutaro Ono | Actor | 1913 | 1 | |
| Ono, Mizuho | Mizuho Ono | Actor | 1997 | 1 | |
| Orberg, Lisa | Lisa Orberg | Actor | 1974 | 1 | |
| Orenstein, Sarah | Sarah Orenstein | Actor | 2004 | 1 | |
| Orloff, Penny | Penny Orloff | Actor | 1982 | 1 | |
| Orlovsky, Claudia | Claudia Orlovsky | Choreographer | 1998 | 1 | |
| Ormond, Claire | Claire Ormond | Actor | 1993 | 1 | |
| Orr, Diane | Diane Orr | Actor | 1979 | 1 | |
| Orsky, Gudrun | Gudrun Orsky | Director | 2004 | 1 | |
| Osborn, Elmar | Elmar Osborn | Actor | 1955 | 1 | |
| Osborne, Dorithy | Dorithy Osborne | Actor | 1943 | 1 | |
| Ott, Günther | Günther Ott | Actor | 1931 | 1 | |
| Ottavino, John | John Ottavino | Actor | 1997 | 1 | |
| Otto, Pavel | Pavel Otto | Actor | 1957 | 1 | |
| Otto, Wilfried | Wilfried Otto | Designer | 1958 | 1 | |
| Ouyoung, Juliet | Juliet Ouyoung | Costume Designer | 1993 | 1 | |
| Overbey, Kellie | Kellie Overbey | Actor | 1998 | 1 | |
| Owen, Hugh | Hugh Owen | Designer | 1927 | 1 | |
| Owings, Sarah | Sarah Owings | Actor | 1976 | 1 | |
| O'Neil, Raymond | Raymond O'Neil | Actor | 2000 | 1 | |
| O'Malley, Flynn | Flynn O'Malley | Actor | 1963 | 1 | |
| O'Connor, Terrence | Terrence O'Connor | Actor | 1963 | 1 | |
| Obrtelová, Nora | Nora Obrtelová | Dramaturg | 2005 | 1 | |
| Orsza-Łukasiewicz, Janina | Janina Orsza-Łukasiewicz | Director | 1972 | 1 | |
| Olsen, Kathe B. | Kathe B. Olsen | Actor | 2002 | 1 | |
| Ornäs, Gustaf Hiort, af | Gustaf Hiort af Ornäs | Actor | 1956 | 1 | |
| Oriane, Francoise | Francoise Oriane | Actor | 1984 | 1 | |
| O'Connor, Kaleigh | Kaleigh O'Connor | Actor | 2002 | 1 | |
| O'Connor, Savannah | Savannah O'Connor | Actor | 2002 | 1 | |
| O'Kelly, Geri | Geri O'Kelly | Choreographer | 1993 | 1 | |
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