Peters created the role of Liesl Von Trapp in the original 1959 Broadway production of The Sound of Music. She received a Tony Award nomination for Best Supporting or Featured Actress in a Musical, which she shared with her sibling castmates. She was married to actor Jon Voight (1962–67), whom she met when he joined the cast as Nazi messenger boy Rolfe, with whom Liesl has a song ("Sixteen Going on Seventeen") and a mutual attraction. She can be heard on the show's cast album, which has sold more than three million copies in the US.
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