Allison Williams may be the only person we've ever seen turn her Halloween fantasy into a reality. After the first photo of the Girls star playing Peter Pan in NBC's live musical was released, she shared a photo of herself dressing the part as a youngster. While filling the role made famous by Mary Martin in the '50s is obviously a big deal, we think Williams will be able to fill her shoes, er, pointy hat. The proof? As she joked in her Instagram caption, "I've been rehearsing for a REALLY long time." Sometimes growing up totally pays off.
Photo: Nino Munoz / NBC