Johannes von Trapp, the youngest child of Baron Georg von Trapp and Maria Kutschera, is an honorary chair of the gala, while Daniel Truhitte, who played Rolfe, the suitor of Liesl, a von Trapp daughter in the film, will appear in the concert as Baron Elberfeld, a guest at a party given by the baron.

FORBES: Youngest von Trapp Child Discusses 'The Sound Of Music'