| Lauten, George | George Lauten | Actor | 1931 | 1 | |
| Langlie, Gordon | Gordon Langlie | Actor | 1931 | 1 | |
| Lenihan, Winifred | Winifred Lenihan | Director | 1931 | 1 | |
| Lenihan, Cecilia | Cecilia Lenihan | Actor | 1931 | 1 | |
| Lomas, Herbert | Herbert Lomas | Actor | 1930 - 1952 | 2 | |
| Langhoff, Wolfgang | Wolfgang Langhoff | Actor | 1930 - 1944 | 6 | |
| Lantos, Belá | Belá Lantos | Actor | 1930 - 1938 | 4 | |
| Lowe, K. Elmo | K. Elmo Lowe | Actor, Director | 1930 - 1936 | 2 | |
| Litten, Dr. Heinz Wolfgang | Heinz Wolfgang Litten (Dr. Heinz Wolfgang Litten) | Director | 1930 - 1932 | 2 | |
| Langley, Hubert | Hubert Langley | Actor | 1930 - 1931 | 2 | |
| Lovell, Margaret Jean | Margaret Jean Lovell | Actor | 1930 | 1 | |
| Loerscheidt, Heinz | Heinz Loerscheidt | Actor | 1930 | 1 | |
| Leighty, Chester | Chester Leighty | Actor | 1930 | 1 | |
| Lindsey, Jay | Jay Lindsey | Actor | 1930 | 1 | |
| Lander, Charles | Charles Lander | Actor | 1930 | 1 | |
| Littledale, Richard | Richard Littledale | Actor | 1930 | 1 | |
| Lyon, Marjorie | Marjorie Lyon | Actor | 1930 | 1 | |
| Lohikoski, Aino | Aino Lohikoski | Actor | 1930 | 1 | |
| Lewis, Ivor | Ivor Lewis | Actor | 1930 | 1 | |
| Le Gallienne, Julie | Julie Le Gallienne | Translator | 1929 - 1940 | 5 | |
| Lauterer, Arch | Arch Lauterer | Designer | 1929 - 1930 | 2 | |
| Leach, Viola | Viola Leach | Actor | 1929 | 2 | |
| Livingstone, Charles | Charles Livingstone | Actor | 1929 | 1 | |
| Loew, Albert | Albert Loew | Actor | 1929 | 2 | |
| la Roche, Rena | Rena la Roche | Actor | 1929 | 1 | |
| Loughton, Phyllis | Phyllis Loughton | Actor | 1929 | 1 | |
| Liesting, Jos | Jos Liesting | Actor | 1929 | 1 | |
| Leslie, Noël | Noël Leslie | Actor | 1929 | 1 | |
| Lenuța, - | - Lenuța | Actor | 1929 | 2 | |
| Löwenadler, Holger | Holger Löwenadler | Actor | 1928 - 2005 | 11 | 1 |
| Lund, Vilhelm | Vilhelm Lund | Actor | 1928 - 1981 | 20 | |
| Laurie, John | John Laurie | Actor | 1928 - 1965 | 4 | 1 |
| Lindwall, Tore | Tore Lindwall | Actor | 1928 - 1961 | 7 | 1 |
| Lindström, Erik | Erik Lindström | Actor | 1928 - 1961 | 4 | 1 |
| Liška, Miloš | Miloš Liška | Actor | 1928 - 1960 | 6 | |
| Lalande, Maria | Maria Lalande | Actor | 1928 - 1947 | 4 | |
| Lindahl, Anna-Lisa | Anna-Lisa Lindahl | Actor | 1928 - 1947 | 4 | 1 |
| Lehotay, Árpád | Árpád Lehotay | Actor, Director | 1928 - 1944 | 8 | 1 |
| Lagzdiņš, Kārlis | Kārlis Lagzdiņš | Actor | 1928 - 1943 | 2 | |
| Linhart, Oskar | Oskar Linhart | Actor, Adaptation, Director | 1928 - 1943 | 9 | |
| López Heredia, Irene | Irene López Heredia | Actor, Producer | 1928 - 1943 | 3 | |
| Lindorff, Henny | Henny Lindorff | Actor | 1928 - 1941 | 5 | |
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