Theatregoers at the Dec. 2 performance of The Sound of Music will be seeing triple. The producers and publicists of the Broadway revival have corralled six of the original von Trapp children of the story and all seven of the actors who played the von Trapps on screen to meet the young actors filling the stage roles in the production. At 10:45 PM, all 20 will take the stage. The von Trapps in attendance will be Agathe, Maria, Rosmarie, Johannes and Werner von Trapp and Eleonore T. Campbell. The film actors include Charmian Carr, Nicholas Hammond, Heather Menzies, Duane Chase, Angela Cartwright, Debbie Turner and Kym Karath. Currently playing the stage children are Sara Zelle, Lou Taylor Pucci, Nora Blackall, Marshall Pailet, Tracy Alison Walsh, Andrea Bowen and Ashley Rose Orr.

The 1959 Rodgers and Hammerstein musical tells the story of a singing would-be nun who transforms the lives of an Austrian widower submarine captain and his seven children through the power of goodness and song. She abandons the convent life to become the captain's wife -- just as the Nazi anschluss makes him a prime target for drafting into the German navy. The show features the R&H standards "Do Re Mi," "My Favorite Things," "Climb Ev'ry Mountain," "Edelweiss" and the title song.

The Sound of Music opened Mar. 12, 1998, at the Martin Beck Theatre.