Templeton was born on December 25, 1865, in Little Rock, Arkansas, where her parents were starring with the Templeton Opera Company. Her father, John Templeton, was a well-known Southern theatre manager, comedian, and author. Her mother, Helen Alice Vane, starred with her husband. At age three, Templeton, dressed as Cupid, sang fairy tale songs between the acts of her father’s plays. Gradually, she was incorporated into the productions as a bit player and then, at five, had actual lines to recite. At eight, she played Puck in A Midsummer Night’s Dream, making her New York debut at Grand Opera House.