Ruth Olay, born Ruth Lissauer on July 1, 1924, in San Francisco, California, was an American jazz singer. She began her musical journey influenced by her mother's professional chorus singing and started taking vocal lessons at age 16 or 17 while working as a secretary at Twentieth Century Fox. Olay's breakthrough came when she replaced Billie Holiday at the Avant Garde Club, leading to her first LP Olay! The New Sound of Ruth Olay on Mercury Records in 1958 and appearances on The Tonight Show Starring Jack Paar. Subsequent albums included Easy Living (1959) and In Person Recorded Live At Mister Kelly's (1960). She continued performing into the 1960s before retiring. Ruth Olay died on September 3, 2021, in Los Angeles at age 97.