Charmian Carr (born Charmian Anne Farnon; December 27, 1942 – September 17, 2016) was an American actress best known for her role as Liesl, the eldest von Trapp daughter in the 1965 film version of The Sound of Music. Charmian Carr (born Charmian Anne Farnon; December 27, 1942 – September 17, 2016) was an American actress best known for her role as Liesl, the eldest von Trapp daughter in the 1965 film version of The Sound of Music.