| Oster, Teresina, | Teresina Oster | Actor | 1906 | 4 | |
| O'Reilly, James | James O'Reilly | Actor | 1981 | 2 | |
| Olivetti, Alessia | Alessia Olivetti | Actor | 2008 | 4 | |
| Olsen, Ole Andreas, | Ole Andreas Olsen | Actor | 1859 | 1 | |
| Olsen, Frk., | Frk. Olsen | Actor | 1874 – 1877 | 5 | |
| Olbrich, Julius, | Julius Olbrich | Actor | 1876 – 1910 | 16 | |
| Otto-Martineck, Rosa, | Rosa Otto-Martineck | Actor | 1876 | 1 | |
| Olsson, Bror, | Bror Olsson | Actor | 1877 – 1898 | 15 | |
| Olsen, -, | - Olsen | Actor | 1883 | 1 | |
| Orlamundt, Hans, | Hans Orlamundt | Actor | 1877 | 13 | |
| Ottomeyer, Hans Leonard, | Hans Leonard Ottomeyer | Actor | 1878 | 1 | |
| Ohlsson, Erik, | Erik Ohlsson | Actor | 1878 – 1880 | 8 | |
| Oppmar, Mr., | Mr. Oppmar | Actor | 1879 | 1 | |
| Offel-Kley, Van, | Van Offel-Kley | Actor | 1880 | 1 | |
| Ohlson, -, | - Ohlson | Actor | 1882 | 1 | |
| Otterström, Ludvig, | Ludvig Otterström | Actor | 1883 – 1884 | 9 | |
| Olsen, Olaus, | Olaus Olsen | Actor | 1884 – 1904 | 39 | 1 |
| Ottesen, Rasmus, | Rasmus Ottesen | Actor | 1902 – 1927 | 18 | |
| Olsson, Mr., | Mr. Olsson | Actor | 1886 | 1 | |
| Olin, Vilhelm, | Vilhelm Olin | Actor | 1886 – 1919 | 2 | |
| Olander, -, | - Olander | Actor | 1887 | 1 | |
| Oeser, Anna, | Anna Oeser | Actor | 1888 | 1 | |
| Ott, Mr., | Mr. Ott | Actor | 1889 – 1890 | 2 | |
| Oberle, Thomas, | Thomas Oberle | Actor | 1891 | 2 | |
| Ottomeyer, J. L., | J. L. Ottomeyer (J. L. Ottomeyer) | Actor | 1891 | 1 | |
| Olchowny, Teodor, | Teodor Olchowny | Actor | 1891 – 1892 | 1 | |
| Olszewski, Stanisław, | Stanisław Olszewski | Actor | 1892 | 1 | |
| Olbrich, Irmgard, | Irmgard Olbrich | Actor | 1893 | 2 | |
| Onorato, Mr., | Mr. Onorato | Actor | 1893 | 2 | |
| Olander, Albert, | Albert Olander | Actor | 1893 | 2 | |
| Orlop, Hermann, | Hermann Orlop | Actor | 1893 | 1 | |
| Oppel, Georg, | Georg Oppel | Actor | 1893 | 9 | |
| Oliver, Olive, | Olive Oliver | Actor | 1894 | 2 | |
| Olszewski, Edward, | Edward Olszewski | Actor | 1894 – 1902 | 3 | |
| Oßmann, Otto, | Otto Oßmann | Actor | 1894 | 1 | |
| Olden, Hans, | Hans Olden | Actor | 1895 | 1 | |
| Oberndorfer, Siegfrid, | Siegfrid Oberndorfer | Actor | 1896 | 1 | |
| Ouvrier, M., | M. Ouvrier | Actor | 1896 | 1 | |
| Otto, Heinrich, | Heinrich Otto | Actor | 1896 | 1 | |
| Osten, Susanne, | Susanne Osten | Actor | 1919 | 1 | |
| Opel, Mr., | Mr. Opel | Actor | 1898 | 1 | |
| Ockert, Mr., | Mr. Ockert | Actor | 1898 | 2 | |
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