| Ostertag, Dietger | Dietger Ostertag | Actor | 2002 | 1 | |
| Ostertag, Bernard | Bernard Ostertag | Actor | 1929 | 1 | |
| Osterop, Marcel | Marcel Osterop | Actor | 2012 - 2013 | 29 | |
| Ostermeier, Thomas | Thomas Ostermeier | Adaptation, Director, Translator | 2002 - 2024 | 232 | |
| Ostermeier, Bettina | Bettina Ostermeier | Composer | 2011 | 1 | |
| Ostermayer, Christine | Christine Ostermayer | Actor | 1965 - 1969 | 3 | |
| Ostermann, Lothar | Lothar Ostermann | Actor | 1960 - 1976 | 6 | |
| Ostermann, Heinz | Heinz Ostermann | Actor | 1995 | 1 | |
| Ostermann, Ferdinand | Ferdinand Ostermann | Actor | 1933 | 1 | |
| Ostermann, Brigitte | Brigitte Ostermann | Dramaturg | 2004 - 2008 | 4 | |
| Osterloh, Hildegard | Hildegard Osterloh | Actor | 1910 - 1916 | 15 | |
| Osterberger, - | - Osterberger | Actor | 1971 | 2 | |
| Osterberg, Craig | Craig Osterberg | Actor, Designer, Lighting Designer | 2009 | 3 | |
| Oster, Teresina | Teresina Oster | Actor | 1906 - 1909 | 4 | |
| Ostendorf, Nils | Nils Ostendorf | Composer | 2008 - 2014 | 54 | 1 |
| Ostendorf, Josef | Josef Ostendorf | Actor | 1991 - 2016 | 8 | |
| Osten, Susanne | Susanne Osten | Actor | 1919 | 1 | |
| Osten, Käte | Käte Osten | Actor | 1919 - 1923 | 3 | |
| Osten, Emil von | Emil von Osten | Actor | 1890 | 1 | |
| Ostaszewski, Jakub | Jakub Ostaszewski | Composer | 1995 | 1 | |
| Ostaszewska, Krystyna | Krystyna Ostaszewska | Actor | 1957 | 1 | |
| Ostapov, Vladimir | Vladimir Ostapov | Actor | 2005 | 1 | |
| Ostapenko, Alexandra | Alexandra Ostapenko | Actor | 2015 - 2022 | 2 | |
| Ostanek, Kristijan | Kristijan Ostanek | Actor | 2009 | 6 | |
| Ostan, Boris | Boris Ostan | Actor | 1994 | 1 | |
| Ostan Vejrup, Jette | Jette Ostan Vejrup | Actor | 1994 | 1 | |
| Ostałowska, Dominika | Dominika Ostałowska | Actor | 2005 - 2006 | 4 | |
| Ost, Kathrin | Kathrin Ost | Actor | 2010 - 2011 | 12 | 2 |
| Ost, Geoffrey | Geoffrey Ost | Producer | 1960 | 1 | |
| Osswald, Leni | Leni Osswald | Costume Designer | 1955 - 1962 | 2 | |
| Ossowski, Nicolas | Nicolas Ossowski | Actor | 2021 - 2023 | 2 | |
| Oßmann, Otto | Otto Oßmann | Actor | 1894 | 1 | |
| Osske, Tamara | Tamara Osske | Actor | 1980 | 1 | |
| Ossa, Francisco | Francisco Ossa | Actor | 2018 | 1 | |
| Ospenskaya, Maria | Maria Ospenskaya | Actor | 1932 | 1 | |
| Ospelt, Ingo | Ingo Ospelt | Actor | 1992 | 1 | |
| Osorio, Silvia | Silvia Osorio | Actor | 1981 | 1 | |
| Osokin, Evgeny | Evgeny Osokin (Евгений Осокин) | Actor | 2021 | 1 | |
| Osmund, Alfred | Alfred Osmund | Actor | 1926 - 1933 | 3 | |
| Osmond, David | David Osmond | Actor | 2012 | 1 | 1 |
| Osmond, Clara | Clara Osmond | Actor | 1906 - 1907 | 3 | |
| Osmelak, Mariusz | Mariusz Osmelak | Actor | 2016 | 1 | |
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