Kym Karath and Duane Chase, who played two of the von Trapp children, speak to PEOPLE about what Andrews was like on the set of the film over 60 years ago Julie Andrews was just as doting in real ...

Julie Andrews and Christopher Plummer (center) with the seven actors who played the von Trapp children in The Sound of Music (1965) ...

Now all grown up 60 years after the classic musical debuted in theaters, Duane Chase — who played younger brother Kurt von Trapp — tells PEOPLE that Andrews, 89, "was kind of a nanny for" the ...