Popular "Sound of Music" actress Charmaine Carr has died at age 73.

Charmaine Carr, who played Liesl von Trapp in The Sound of Music, has died at the age of 73.

The actor’s spokesman said she died on Saturday, September 17 in Los Angeles, of complications from a rare form of dementia.

Carr was best known for her role in the Rodgers and Hammerstein’s 1965 film, in which she performed the song Sixteen Going On Seventeen. She was a college student when she auditioned for the film, which also starred Julie Andrews and Christopher Plummer.

Carr is survived by her four siblings, her two children and four grandchildren. She is also survived by the six other actors who became part of cinematic history when they were cast as the von Trapp children.

May her soul rest in peace.