Fans of the 1965 movie will perhaps best remember her for her rendition of “Sixteen going on seventeen” in the 1965 film.
Carr was born Charmian Farnon Chicago Illinois, the second child of vaudeville actress Rita Oehman and musician Brian Farnon. Her mother arranged for her to audition for the role, although she had had no singing or acting lessons.
Rodgers and Hammerstein’s The Sound of Music was a massive hit which, at the time of its screening, surpassed Gone with the Wind as the highest-grossing film of all time.
Carr later wrote two books on her experience, Forever Liesl and Letters to Liesl, and often appeared at events commemorating the movie.
Her only other major role was in the Stephen Sondheim television musical Evening Primrose.
After leaving the film industry, Carr ran an interior design firm in California.
She died in Los Angeles after complications from a rare form of dementia.
Many fans of The Sound of Music took to Twitter to post their memories. Kym Karath, who played Gretl in the movie, tweeted: “She has been like a sister throughout my life.”
The eldest daughter of the Austrian family who inspired the film, Agathe von Trap, died aged 97 in 2010.