| Onno, Ferdinand | Ferdinand Onno | Actor | 1904 - 1938 | 9 | |
| Osterloh, Hildegard | Hildegard Osterloh | Actor | 1910 - 1916 | 15 | |
| Olsen, Ottilie | Ottilie Olsen | Actor | 1906 | 1 | |
| Otto, Marg. | Marg. Otto | Actor | 1906 - 1908 | 3 | |
| Ottmay, Georg | Georg Ottmay | Actor | 1906 - 1961 | 8 | |
| Oehlmann, Hans | Hans Oehlmann | Actor | 1909 | 1 | |
| Olden, Arno W. | Arno W. Olden | Actor | 1910 | 1 | |
| O’Brien, Fergus | Fergus O’Brien | Sound Designer | 2006 | 9 | |
| Oswald, Richard | Richard Oswald | Actor, Director, Producer | 1910 - 1919 | 10 | |
| Osmarr, Lili | Lili Osmarr | Actor | 1911 - 1926 | 7 | |
| Orska, Daisy | Daisy Orska | Actor | 1911 | 1 | |
| Ott, Gisa | Gisa Ott | Actor | 1910 - 1941 | 9 | |
| Otto, Martina | Martina Otto | Actor | 1915 - 1925 | 7 | |
| Orth, Hubert | Hubert Orth | Actor | 1916 - 1917 | 2 | |
| Ostwald, Frank | Frank Ostwald | Actor | 1917 - 1937 | 5 | |
| Ott, Rita | Rita Ott | Actor | 1917 | 1 | |
| Oesterheld, Heinrich | Heinrich Oesterheld | Actor | 1918 | 2 | |
| Orth, Frk. | Frk. Orth | Actor | 1918 | 2 | |
| Opitz, Felicitas | Felicitas Opitz | Actor | 1918 - 1919 | 2 | |
| Oettinger, Liesel | Liesel Oettinger | Actor | 1919 | 1 | |
| Oehler, Hans | Hans Oehler | Actor | 1919 | 1 | |
| Otto-Morgenstern, Martina | Martina Otto-Morgenstern | Actor | 1920 - 1921 | 2 | |
| Ott, Magdalena | Magdalena Ott | Actor | 1919 | 2 | |
| Otto-Osmarr, Lili | Lili Otto-Osmarr | Actor | 1920 | 2 | |
| Oehlschläger, Margarethe | Margarethe Oehlschläger | Choreographer | 1921 | 1 | |
| Olsen, Hanns | Hanns Olsen | Actor | 1921 - 1931 | 4 | |
| Oppermann, Leonore | Leonore Oppermann | Actor | 1919 - 1922 | 3 | |
| Osten, Käte | Käte Osten | Actor | 1919 - 1923 | 3 | |
| Ozory, Armand | Armand Ozory | Actor | 1925 - 1952 | 8 | |
| Olden, Melanie | Melanie Olden | Actor | 1926 | 1 | |
| Oszke, - | - Oszke | Actor | 1928 | 1 | |
| Ondra, - | - Ondra | Actor | 1928 | 1 | |
| Oltersdorf, Erich | Erich Oltersdorf | Actor | 1928 | 1 | |
| Otto, Hans | Hans Otto | Actor | 1929 | 1 | |
| Ostermann, Ferdinand | Ferdinand Ostermann | Actor | 1933 | 1 | |
| Ott, Rudolf | Rudolf Ott | Actor | 1935 | 1 | |
| Obonya, Hanns | Hanns Obonya | Actor | 1935 | 1 | |
| Overlack, Olga | Olga Overlack | Actor | 1938 | 1 | |
| Oppel, Günther | Günther Oppel | Actor | 1938 | 1 | |
| Ornelli, Otto | Otto Ornelli | Choreographer | 1938 | 1 | |
| Olszewski, Reinhold | Reinhold Olszewski | Actor | 1938 | 1 | |
| Obermaier, Marta | Marta Obermaier | Actor | 1947 | 1 | |
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