The Sound of Music's youngest Von Trapp child looks unrecognisable 56 years on

Kym Karath began her acting career at age three when she appeared in Spencer's Mountain (1963) with Henry Fonda and Veronica Cartwright. She's best known for her role in "The Sound of Music,"(1965) as the youngest child, Gretl Von Trapp, where she worked with Veronica's younger sister, Angela Cartwright. Kym shares her memory of meeting another child actress at the Museum, Margaret O'Brien, who starred in and won an oscar for her role in "Meet Me in St. Louis," starring Judy Garland. O'Brien len

Kym Karath's Biography: Net Worth, Plastic Surgery, Husband, Age