Lansing's film career began in 1948, and in 1952, she played an uncredited role in MGM's Singin' in the Rain. She received top billing in Hot Cars (1956), a crime drama involving a stolen-car racket. In the opening sequence of Orson Welles's Touch of Evil (1958), she appeared as Zita, the Dancer who dies at the end of the famous first tracking shot, during which her character exclaims to a border guard, "I keep hearing this ticking noise inside my head!"