| Name | Functions | Event Dates | Events | Resources  | ||
|---|---|---|---|---|---|---|
| Mr. Ott | Actor | 1889 | 2 | |||
| Thomas Oberle | Actor | 1891 - 1904 | 2 | |||
| J. L. Ottomeyer | Actor | 1891 | 1 | |||
| Leonard Outram | Actor, Director | 1891 - 1897 | 7 | |||
| Teodor Olchowny | Actor | 1891 | 1 | |||
| Stanisław Olszewski | Actor | 1892 | 1 | |||
| Irmgard Olbrich | Actor | 1893 - 1901 | 2 | |||
| Mr. Onorato | Actor | 1893 | 2 | |||
| Albert Olander | Actor | 1893 | 2 | |||
| Hermann Orlop | Actor | 1893 | 1 | |||
| Georg Oppel | Actor | 1893 - 1926 | 9 | |||
| Fritz Odemar | Actor, Director | 1893 - 1934 | 5 | |||
| Olive Oliver | Actor | 1894 - 1904 | 2 | |||
| Edward Olszewski | Actor | 1894 - 1902 | 3 | |||
| Otto Oßmann | Actor | 1894 | 1 | |||
| O. Orling | Designer | 1895 | 2 | |||
| Hans Olden | Actor | 1895 | 1 | |||
| E. Orling | Designer | 1895 - 1896 | 6 | |||
| Siegfrid Oberndorfer | Actor | 1896 | 1 | |||
| Otto Osmarr | Actor, Director | 1889 - 1919 | 23 | |||
| M. Ouvrier | Actor | 1896 | 1 | |||
| Heinrich Otto | Actor | 1896 | 1 | |||
| Susanne Osten | Actor | 1919 | 1 | |||
| Breitner og Bauer | Designer | 1897 | 1 | |||
| Nils Ostendorf | Composer | 2008 - 2014 | 54 | |||
| Mr. Opel | Actor | 1898 | 1 | |||
| Mr. Ockert | Actor | 1898 - 1900 | 2 | |||
| Bengt Olsen | Actor | 1898 | 1 | |||
| Alex Otto | Actor, Director, Playwright | 1898 - 1934 | 21 | |||
| Mr. Ohde | Actor | 1898 | 1 | |||
| Paweł Owerłło | Actor | 1899 - 1905 | 2 | |||
| Otto Ockert | Actor | 1899 | 1 | |||
| Harry Oscar | Director | 1900 | 1 | |||
| Rudolf Opel | Actor | 1901 - 1910 | 3 | |||
| Margarethe Ormond | Actor | 1900 - 1901 | 2 | |||
| Hertha Olden | Actor | 1902 | 2 | |||
| Minna Ostheim | Actor | 1900 - 1908 | 4 | |||
| Anna Oehlschläger | Actor | 1904 - 1908 | 2 | |||
| Hans Oberländer | Director | 1904 - 1908 | 2 | |||
| Ferdinand Onno | Actor | 1904 - 1938 | 9 | |||
| Hildegard Osterloh | Actor | 1910 - 1916 | 15 | |||
| Ottilie Olsen | Actor | 1906 | 1 | |||