The star played the eldest Von Trapp child Liesl, and the sad news of her death has been confirmed on her official website.
A statement posted on there explains that Charmian’s death came following a dementia diagnosis (via CNN).
The Rodgers & Hammerstein Organisation, whose founders created the Broadway musical ‘The Sound Of Music’, have also released a statement.
It reads: “Charmian Carr played the eldest Von Trapp child, and in some ways she maintained that role in real life - guiding, cheering, supporting and generally being there for the rest of her ‘sisters’ and ‘brothers’.
Kym Karath, who played youngest Von Trapp, Gretl, has shared her condolences on Twitter:
Charmian landed one other big TV role during career, starring in Stephen Sondheim’s ‘Evening Primrose’, and she also penned two books about her experiences working on ‘The Sound Of Music’.