Sound of Music Museum Opens September 18, 2026 The von Trapp and Whitehead Families. (not pictured) Nicholas Hammond & Angela Cartwright Kym with Curator of the Museum Peter Husty The cast of the movie The Sound of Music for the opening Duane Chase (Kurt), Debbie Turner (Marta), Kym Karath (Gretl), Nicholas Hammond (Fredrich) All in one place. Angela Cartwright (Brigitta) was unable to attend the event but made a video message that was played for the audience. Nicholas Hammond recieved 4 awards for his documentary 'Climb Every Mountain' about the family von Trapp. The Marionette Theatre play of Sound of Music. The movie cast meets their characters. Nicholas meets Frederich Kym with her Gretl puppet The cake celebration Kym & Nicholas Outside the Museum
