Channel 13 first signed on the air on September 17, 1948 as KLAC-TV (standing for Los Angeles, California), and adopted the moniker "Lucky 13". It was originally co-owned with local radio station KLAC (570 AM). Operating as an independent station early on, it began running some programming from the DuMont Television Network in 1949 after KTLA (channel 5) disaffiliated from the network after a one-year tenure. One of KLAC-TV's earlier stars was veteran actress Betty White, who starred in "Al Jarvis's Make-Believe Ballroom" (later "Hollywood on Television") from 1949 to 1952, and then her own sitcom, "Life with Elizabeth" from 1952 to 1956. Television personality Regis Philbin and actor/director Leonard Nimoy once worked behind the scenes at channel 13, and Oscar Levant had his own show on the station from 1958 to 1960.