The three-hour Dec. 5 live telecast will feature six-time Grammy winner Underwood as Maria and “True Blood” star Stephen Moyer as Capt. Georg von Trapp with Tony Award winners McDonald (Mother Abbess), Benanti (Elsa Schrader) and Borle (Max Dettweiler).
The young cast set to play the von Trapp children are Ariane Rinehart (Liesl), Michael Nigro (Fredrich), Ella Watts-Gorman (Louisa), Joe West (Kurt), Sophia Caruso (Brigitta), Grace Rundhaug (Marta) and Peyton Ella as young Gretl.
The creative team includes production designer Derek McLane, art director Kevin Rupnik and assistant art director Aimee Dombo.
The Sound of Music Live! is produced by Universal Television.
View an extended teaser below: