Charmian Carr, Star of ‘The Sound of Music,’ Dies at 73

Charmian Carr, the actress best known for her role of Liesl von Trapp in “The Sound of Music,” died Saturday in Woodland Hills, according to her publicist.

Actress Charmian Carr attends The Academy Of Motion Picture Arts And Sciences' Last 70mm Film Festival Screening Of "The Sound Of Music" at July 30, 2012. She died on Sept. 17, 2016. (Credit: Valerie Macon/Getty Images)

Actress Charmian Carr attends The Academy Of Motion Picture Arts And Sciences’ Last 70mm Film Festival Screening Of “The Sound Of Music” at July 30, 2012. She died on Sept. 17, 2016. (Credit: Valerie Macon/Getty Images)

She died of complications from a rare form of dementia at 73, B. Harlan Boll said in an email.

The death was also confirmed on Carr’s website.

Carr was 21 when “The Sound of Music” was filmed. In the classic film, Carr played the eldest von Trapp sister and sang the song “Sixteen going on seventeen.”

She also starred opposite Anthony Perkins in the Stephen Sondheim television musical “Evening Primrose.”

Though she was best known for her acting, Carr was also an interior designer. She started her own design business, Charmian Carr Design, and later became friends with her most famous client, Michael Jackson.

Carr cowrote two books, “Forever Liesl” and “Letters to Liesl,” both were an ode to her character in the musical.

Carr is survived by her two sisters and two brothers, two daughters and four grandchildren, the publicist said.