Split 2016 - IMDb.
Split is about three girls get kidnapped by a man with dissociative identity disorder DID that has 23 personalities. I have to say that this movie does not represent what DID really is and how people who struggle with it are, mainly because this movie gets a bit too fantastical sometimes.
Split 2016 American film - Wikipedia.
Split was a commercial success, grossing $278million worldwide on a budget of $9million. Split is a standalone sequel to Shyamalan's' 2000 film Unbreakable although not marketed as such, instead saving the revelation for a scene featuring Bruce Willis reprising his Unbreakable role in an uncredited cameo.