There's less than a month to go until The Sound of Music premieres live on NBC on December 5. Luckily, the production's cast already looks hard at work in rehearsals for the Rogers & Hammerstein musical. In the new promo for the three-hour special, fans get to hear star Carrie Underwood (Maria Von Trapp) perform not one but two classic songs: "My Favorite Things" and "The Sound of Music." Viewers also get also get a first look at five-time Tony winner Audra McDonald (Mother Abbess) in full nun attire, a glimpse at Stephen Moyer's (Captain Von Trapp) fancy footwork and Tony winners Christian Borle and Laura Benanti hamming it up as Max Detweiler and Elsa Schrader! Check out the promo below!