| Ouvrier, M. | M. Ouvrier (M. Ouvrier) | Actor | 1896 | 1 | |
| Otto, Heinrich | Heinrich Otto (Heinrich Otto) | Actor | 1896 | 1 | |
| Osten, Susanne | Susanne Osten (Susanne Osten) | Actor | 1919 | 1 | |
| Opel, Mr. | Mr. Opel (Mr. Opel) | Actor | 1898 | 1 | |
| Ockert, Mr. | Mr. Ockert (Mr. Ockert) | Actor | 1898 - 1900 | 2 | |
| Olsen, Bengt | Bengt Olsen (Bengt Olsen) | Actor | 1898 | 1 | |
| Ohde, Mr. | Mr. Ohde (Mr. Ohde) | Actor | 1898 | 1 | |
| Owerłło, Paweł | Paweł Owerłło (Paweł Owerłło) | Actor | 1899 - 1905 | 2 | |
| Ockert, Otto | Otto Ockert (Otto Ockert) | Actor | 1899 | 1 | |
| Opel, Rudolf | Rudolf Opel (Rudolf Opel) | Actor | 1901 - 1910 | 3 | |
| Ormond, Margarethe | Margarethe Ormond (Margarethe Ormond) | Actor | 1900 - 1901 | 2 | |
| Olden, Hertha | Hertha Olden (Hertha Olden) | Actor | 1902 | 2 | |
| Ostheim, Minna | Minna Ostheim | Actor | 1900 - 1908 | 4 | |
| Oehlschläger, Anna | Anna Oehlschläger (Anna Oehlschläger) | Actor | 1904 - 1908 | 2 | |
| Onno, Ferdinand | Ferdinand Onno (Ferdinand Onno) | Actor | 1904 - 1938 | 9 | |
| Osterloh, Hildegard | Hildegard Osterloh (Hildegard Osterloh) | Actor | 1910 - 1916 | 15 | |
| Olsen, Ottilie | Ottilie Olsen (Ottilie Olsen) | Actor | 1906 | 1 | |
| Otto, Marg. | Marg. Otto | Actor | 1906 - 1908 | 3 | |
| Ottmay, Georg | Georg Ottmay (Georg Ottmay) | Actor | 1906 - 1961 | 8 | |
| Oehlmann, Hans | Hans Oehlmann (Hans Oehlmann) | Actor | 1909 | 1 | |
| Olden, Arno W. | Arno W. Olden (Arno W. Olden) | Actor | 1910 | 1 | |
| Osmarr, Lili | Lili Osmarr (Lili Osmarr) | Actor | 1911 - 1926 | 7 | |
| Orska, Daisy | Daisy Orska (Daisy Orska) | Actor | 1911 | 1 | |
| Ott, Gisa | Gisa Ott (Gisa Ott) | Actor | 1910 - 1941 | 9 | |
| Otto, Martina | Martina Otto (Martina Otto) | Actor | 1915 - 1925 | 7 | |
| Orth, Hubert | Hubert Orth (Hubert Orth) | Actor | 1916 - 1917 | 2 | |
| Ostwald, Frank | Frank Ostwald (Frank Ostwald) | Actor | 1917 - 1937 | 5 | |
| Ott, Rita | Rita Ott (Rita Ott) | Actor | 1917 | 1 | |
| Oesterheld, Heinrich | Heinrich Oesterheld (Heinrich Oesterheld) | Actor | 1918 | 2 | |
| Orth, Frk. | Frk. Orth (Frk. Orth) | Actor | 1918 | 2 | |
| Opitz, Felicitas | Felicitas Opitz (Felicitas Opitz) | Actor | 1918 - 1919 | 2 | |
| Ottzenn, Paula | Paula Ottzenn (Paula Ottzenn) | Actor | 1919 - 1936 | 10 | |
| Oettinger, Liesel | Liesel Oettinger (Liesel Oettinger) | Actor | 1919 | 1 | |
| Oehler, Hans | Hans Oehler (Hans Oehler) | Actor | 1919 | 1 | |
| Otto-Morgenstern, Martina | Martina Otto-Morgenstern (Martina Otto-Morgenstern) | Actor | 1920 - 1921 | 2 | |
| Ott, Magdalena | Magdalena Ott (Magdalena Ott) | Actor | 1919 | 2 | |
| Otto-Osmarr, Lili | Lili Otto-Osmarr (Lili Otto-Osmarr) | Actor | 1920 | 2 | |
| Olsen, Hanns | Hanns Olsen (Hanns Olsen) | Actor | 1921 - 1931 | 4 | |
| Oppermann, Leonore | Leonore Oppermann (Leonore Oppermann) | Actor | 1919 - 1922 | 3 | |
| Osten, Käte | Käte Osten (Käte Osten) | Actor | 1919 - 1923 | 3 | |
| Ozory, Armand | Armand Ozory (Armand Ozory) | Actor | 1925 - 1952 | 8 | |
| Olden, Melanie | Melanie Olden (Melanie Olden) | Actor | 1926 | 1 | |
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