| First Name | Louis |
| Middle Name | B. |
| Last Name | Mayer |
| Full Name at Birth | Ezemiel Mayer |
| Age | 73 (age at death) |
| Date of Birth | July 12, 1884 |
| Birthplace | Minsk, Byelorussia, Russian Empire |
| Date of Death | October 29, 1957 |
| Location of Death | Los Angeles, California |
| Cause of Death | Leukemia |
| Height | 5' 3" (160 cm) |
| Build | Large |
| Eye Color | Brown - Dark |
| Hair Color | Grey |
| Star Sign | Cancer |
| Religion | Jewish |
| Ethnicity | White |
| Nationality | Russian |
| Occupation Category | Film/TV Producer |
| Claim to Fame | Head of MGM Studio |
| Father | Jacob Mayer |
| Mother | Sarah Mayer |
| Brother(s) | Jerry MayerRudolph Mayer |
| Sister(s) | Yetta MayerIda Mayer |
| Friends | W.S. Van Dyke, Irving Thalberg, Paul Bern, Eddie Mannix, Douglas Shearer, Darryl F. Zanuck, Richard A. Rowland, B. P. Schulberg, Nicholas Schenck |
| Associated People | John M. Stahl |
Louis Burt Mayer (July 12, 1884 – October 29, 1957) born Lazar Meir (Russian: ) was an American film producer. He is generally cited as the creator of the "star system" within Metro-Goldwyn-Mayer (MGM) in its golden years. Known always as Louis B. Mayer and often simply as "L.B.", he believed in wholesome entertainment and went to great lengths so that MGM had "more stars than there are in the heavens".
Selected Louis B. Mayer film and TV show credits: