Mattel is doing big things with its smallest doll line. Mattel Films is developing a live-action feature film inspired by Polly Pocket with Metro Goldwyn Mayer and Lena Dunham’s production company Good Thing Going.

The movie will follow a young girl who befriends a pocket-sized woman.

Dunham is set to write and direct the family-focused comedy, with Lily Collins starring as Polly. Robbie Brenner and Kevin McKeon will lead the project for Mattel Films alongside MGM’s Sandino Moya-Smith and Winnie Carillo. Liz Watson and Michael Cohen from Good Thing Going will serve as executive producers.

This agreement is the most recent in a raft of live-action efforts from Mattel and MGM. The partners previously announced films based on the American Girl brand and the View-Master property.

Polly Pocket first launched in 1989, and Mattel relaunched the brand in 2018 with a new product line. In 2019, Universal Kids picked up the first two seasons of DHX Media and Mattel’s animated series Polly Pocket. The continued expansion of the Polly Pocket brand comes as dolls contributed to a 47% sales bump in Mattel’s Q1 2021, to the tune of US$874 million.