Story highlights

Carr died of complications from a rare form of dementia

Kym Karath, who played youngest Von Trapp child, Gretl, called Carr "exquisite"

CNN  — 

Charmian Carr, best known for her role as Liesl in the film version of “The Sound of Music,” died Saturday at the age of 73, her website and the Rodgers & Hammerstein Organization confirmed.

Carr died of complications from a rare form of dementia, her family said.

The actress sang one of the movie’s classic songs, “Sixteen