What's Next After Barbie? An Update on Lily Collins' Polly Pocket Movie

Life in plastic really is fantastic.

Case in point: A movie based on Polly Pocket starring Lily Collins is in the works amid Barbie's box office dominance. And according to Robbie Brenner, the head of Mattel Films and a producer on Barbie and all developing Mattel movie projects, there's already a "great" script written by Lena Dunham for the live-action adaptation of the beloved miniature toy.

"First of all, they are two of my favorite ladies ever," Brenner told Variety of Collins and Dunham in a July 26 interview. "It's been an amazing collaboratio…