(Radio.com) Ariana Grande has announced via social media that she has been casted to play the role of Penny in the upcoming live television broadcast of the musical Hairspray.

"Hi I have to tell you something very very exciting today, she began. "most of you know that i'm really just a musical theater geek�. like a really big one� so�. my heart is very full re: this announcement. I AM NOWWW A CHECKERBOARD CHICK #HairsprayLive #Penny."

"Penny has been a dream role since Hairspray opened on Broadway," she continued. "At 9, I was (and still am) in LOVE w @KerryButlerNyc. hope to make u proud."

Hairspray Live! will air on NBC on Wednesday, December 7th at 8 pm. Check out Ariana's tweets here.

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