| Lilley, Edwin | Edwin Lilley | Actor | 1959 | 1 | |
| Landerholm, Ragnar | Ragnar Landerholm | Actor | 1959 | 6 | |
| Longford, Lord | Lord Longford | Costume Designer | 1959 | 1 | |
| Long, Mae | Mae Long | Actor | 1959 | 1 | |
| Lozinskaja, A. | A. Lozinskaja | Actor | 1959 | 1 | |
| Lavialle, Charles | Charles Lavialle | Actor | 1959 | 1 | |
| Luraschi, Adrienne | Adrienne Luraschi | Director | 1959 | 1 | |
| León, Juan | Juan León | Designer, Dramaturg | 1958 - 2006 | 9 | |
| Lundqvist, Christina | Christina Lundqvist | Actor | 1958 - 2005 | 3 | |
| László, Károly | Károly László | Actor | 1958 - 1996 | 3 | |
| Lindblad, Gunnar | Gunnar Lindblad | Designer | 1958 - 1961 | 2 | |
| Lang, Harold | Harold Lang | Actor | 1958 - 1959 | 2 | |
| Lambert, John | John Lambert | Composer | 1958 - 1959 | 2 | |
| Langwagen, Peter | Peter Langwagen | Actor | 1958 | 1 | |
| Lipińska, Danuta | Danuta Lipińska | Actor | 1958 | 1 | |
| Lejtényi, Éva | Éva Lejtényi | Actor | 1958 | 1 | |
| Lenkey, Vali | Vali Lenkey | Actor | 1958 | 1 | |
| Lopez, Daniel | Daniel Lopez | Actor | 1958 | 1 | |
| Lannerstedt, Ninja | Ninja Lannerstedt | Actor | 1958 | 1 | |
| Lloyd, Sherman | Sherman Lloyd | Actor | 1958 | 1 | |
| Lamb, Don | Don Lamb | Actor | 1958 | 1 | |
| Lehmbrok, Peter | Peter Lehmbrok | Actor | 1958 | 1 | |
| Lajos, Mary | Mary Lajos | Costume Designer, Designer | 1958 | 2 | |
| Levite, R. | R. Levite | Director | 1958 | 1 | |
| Latham, Stuart | Stuart Latham | Director | 1958 | 1 | |
| Lindblom, Gunnel | Gunnel Lindblom | Actor, Adaptation, Director | 1957 - 2013 | 13 | |
| Langham, Michael | Michael Langham | Director | 1957 - 1996 | 2 | |
| Láng, Rudolf | Rudolf Láng | Costume Designer | 1957 - 1969 | 3 | |
| Løkkeberg, Cecilie | Cecilie Løkkeberg | Actor | 1957 - 1967 | 2 | |
| Luther, Fritz | Fritz Luther | Actor | 1957 - 1966 | 3 | |
| Lohmann, Henry | Henry Lohmann | Actor | 1957 - 1965 | 3 | |
| Lederer, Richard | Richard Lederer | Actor | 1957 - 1965 | 2 | |
| Lacombe, André | André Lacombe | Actor | 1957 - 1963 | 2 | |
| Løvaas, Birger | Birger Løvaas | Actor | 1957 - 1960 | 3 | |
| Larsen, Ejnar | Ejnar Larsen | Actor | 1957 - 1959 | 2 | |
| Lewis, Ronald | Ronald Lewis | Actor | 1957 - 1959 | 3 | |
| Lhota, Karel | Karel Lhota | Director | 1957 | 1 | |
| Lindig, Georg | Georg Lindig | Actor | 1957 | 1 | |
| Lovell, Susan | Susan Lovell | Designer | 1957 | 1 | |
| Lussier, Jr., Raymond G. | Raymond G. Lussier, Jr. | Actor | 1957 | 1 | |
| Løye, Hanne | Hanne Løye | Actor | 1957 | 1 | |
| Laurentowski, Zenon | Zenon Laurentowski | Actor | 1957 | 1 | |
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