Heather Menzies-Urich, Actress In 'Sound Of Music,' Dies At 68

Heather Menzies-Urich, left, and Kym Karath and Debbie Turner arrive at the 2015 TCM Classic Film Festival Opening Night Gala The Sound Of Music at TCL Chinese Theatre in Los Angeles.

Heather Menzies-Urich was 15 when she was cast to play Louisa von Trapp, one of the seven singing von Trapp children. She had been recently diagnosed with cancer, according to her son Ryan Urich.

(Image credit: Rich Fury/Rich Fury/Invision/AP)