Charmian Carr, known for her role as Liesl Von Trapp in The Sound of Music, died Saturday (Sept. 17). She was 73.
Carr’s family announced she died in Woodland Hills of complications from a rare form of dementia.
Carr was born on Dec. 27, 1942 in Chicago. She was 21 when she sang the popular “Sixteen Going on Seventeen” as the oldest Von Trapp sister in the Academy Award-winning Sound of Music (1965), starring Julie Andrews and Christopher Plummer.
Carr only starred in one other film, appearing opposite Anthony Perkins in Evening Primrose (1966).
After Carr left the movie business, she started a design company called Charmian Carr Design, which attracted Michael Jackson as a client.
Carr co-authored two books: Forever Liesl (2000), which chronicled her experience filming Sound of Music, and Letters to Liesl (2001) which was inspired by the thousands of fan mail she received over the years.
Carr is survived by her siblings Sharon, Darleen, Michael and Brian, daughters Jennifer and Emily, niece Julie and grandchildren Emma, Derek, William and Tucker.
This article originally appeared on The Hollywood Reporter.