Kym Karath as Gretl von Trapp
Kym Karath (Gretl)
Coming from a family of performers, Karath appeared in three movies before making The Sound Of Music. At her audition for the role of Gretl, she appeared so confident and talkative that Wise knew he might not find another 5-year-old with such charisma and signed her for the part on the spot. Karath was a regular on All My Children before taking time off to have a baby.