Allison Williams 'can't wait' for live Peter Pan broadcast

Allison Williams as Peter Pan
Allison Williams as Peter PanNBC

Aw, Allison Williams, we can’t wait for “Peter Pan Live!” either.

The star of NBC’s upcoming telecast posted a photo to Instagram Tuesday of herself, dressed as the title role, looking wistfully outside at the evening sky.

"Peter in the window. My month of prep ended on Friday, and rehearsals began yesterday. Can't. Wait. 12/4/14,” the “Girls” actress wrote in the caption.

Williams, the daughter of "NBC Nightly News" anchor Brian Williams, has posted other photos from rehearsals, along with a video of herself taking flying lessons. Last month, executive producer Neil Meron tweeted a picture of Williams in costume along with Christopher Walken as Captain Hook.

wow!!!!+#allisonwilliams+#chriswalken+@craigzadan+@broadwayworld+#PeterPanLive+Dec.+4+pic.twitter.com/mzObXroj1i

—+Neil+Meron+(@neilmeron)+September+24,+2014+

“Peter Pan Live” will air Dec. 4. It will be NBC’s second live musical, after last year’s "Sound of Music Live!” starring country singer Carrie Underwood as Maria von Trapp.