McCall debuted onstage at the Pittsburgh Playhouse in Strange Bedfellows in 1948. In the early 1950s, then still known as Mitzi Steiner, McCall had the Kiddie Castle program on KDKA-TV in Pittsburgh, Pennsylvania.
McCall made her stage debut at the Pittsburgh Playhouse in "Strange Bedfellows" in 1948.  During the early 1950s, she was known as Mitzi Steiner and hosted a children's program called "Kiddie Castle" on KDKA-TV in Pittsburgh.