Williams will be joined by Academy Award winner Christopher Walken as Captain Hook. It was previously reported that Tony Award-winning Peter and the Starcatcher and "Smash" star Christian Borle is in final negotiations to star as Smee and Mr. Darling.
Complete casting is expected to be announced shortly.
In recent weeks Williams also shared a video clip of her first flight during rehearsals for Peter Pan, a role she says has been a longtime dream.
"I sort of very tentatively offered to cut my hair," she said during a Sept. 3 interview on "Today." "I was like, 'You know, if it's a thing that would help I could cut my hair,' and they were like, 'You're welcome to do that, we're still gonna put you in a wig.'"
Williams also addressed the feat of performing a Broadway musical live for millions of television viewers. "We're so excited about the live part of it," she added. "I think that's what makes it so fun. When I tuned in to watch 'The Sound of Music,' that's what makes it exciting. It's theatre, but it's right in the comfort of your own home... That's what attracted me to it, in part." Check out the photo of Williams as Peter Pan below:
The original Broadway production of Peter Pan, directed and choreographed by Jerome Robbins and featuring the songs “I’m Flying,” “I’ve Gotta Crow,” “I Won’t Grow Up,” and “Never Never Land,” opened on Broadway in 1954. The show had a book by J.M. Barrie and a score by Mark “Moose” Charlap and Carolyn Leigh, with additional songs by Jule Styne and Betty Comden and Adolph Green. It starred Mary Martin as Peter and Cyril Ritchard as Captain Hook, both of whom won Tony Awards for their performances.
Martin and Ritchard reprised their Broadway roles in a live telecast of the production, which aired on NBC in 1955. The production was so popular that NBC followed it in 1956 with a second live telecast — and in 1960 with a videotaped version, both also starring Martin and Ritchard. The 1960 videotaped version was rebroadcast in 1963, 1966 and 1973 and was released on home video in 1990.