There's another Mattel Toys film in development - this time about a girl who lives inside a portable make-up compact.

'Emily in Paris' star Lily Collins is set to take on the role of Polly Pocket in a live-action film which is in development at Mattel Films.

Lena Dunham, known for creating the TV series 'Girls', will write, direct, and produce the movie for MGM. Lily Collins will also co-produce alongside Dunham and it'll be based on the pocket-sized toy that made its debut in 1989.

According to Entertainment Weekly, the live-action adaptation will tell the story of "a young girl and a pocket-sized woman who form a friendship". Sounds a bit like that Miley Cyrus episode of 'Black Mirror', no?

Creator Lena Dunham said in a statement: "Polly Pocket was responsible for countless hours of childhood escapism for me - Polly gave me a tiny world of magic and autonomy to narrate, so it's pretty poetic to be tackling these same ideas now as a director collaborating with the brilliant Lily Collins, Robbie Brenner [of Mattel Films], Mattel, and MGM.

"I'm so thrilled to bring to bear both my love of this historic property and also my deep-seated belief that young women need smart, playful films that speak to them without condescension."

Collins said she was excited to bring Polly Pocket to the screen in "a fun, modern way", saying she was "obsessed with Polly Pocket" and the experience will be a "dream come true".

The Mattel Films production is just the latest in a long line of upcoming movie adaptations based on popular children's toys from the company. Margot Robbie is set to star in a 'Barbie' movie, with 'Hot Wheels', 'UNO', 'American Girl', 'Barney' (yes, the dinosaur), and 'Magic 8-Ball' all currently in active development.