<Tr> <Th> Spouse (s) </Th> <Td> Philippe L'Equilbec (m . 1985; div. 2005) </Td> </Tr> <Tr> <Th> Children </Th> <Td> </Td> </Tr> <P> Anthea Kimberly "Kym" Karath (born August 4, 1958 in Los Angeles, California, U.S.) is an American actress, best known for her role as Gretl, the youngest of the Von Trapp children, in The Sound of Music . </P> <P> Kym Karath started her career at the age of three, appearing in Spencer's Mountain with Henry Fonda and Veronica Cartwright in 1963 (she would subsequently work with Veronica's younger sister Angela Cartwright in The Sound of Music). Also in 1963, she was seen in The Thrill of It All with Doris Day and James Garner . In 1964, she was seen in Good Neighbor Sam with Jack Lemmon . </P>

Who played the youngest girl in the sound of music