Heather Menzies as Louisa von Trapp

Heather Menzies (Louisa)

A ballet student who had appeared on a local amateur TV show, Menzies had no acting experience when she auditioned for the role of Louisa, but somehow managed to get cast right away. After The Sound Of Music, she starred in the Logan's Run television series as well as other movies. She then gave up acting to become a full time mother to her two children with her husband, actor Robert Urich.