Black Swan is about a ballet dancer who, driven by the demand to perfectly play the lead role in Tchaikovsky’s Swan Lake, descends into madness.

It’s with Natalie Portman and a truly amazing movie. I absolutely recommend watching it, even when you’re not into ballet.

Edit: To be honest just watch Joker too. It tells the story of Joker becoming the Joker and Joaquin Phoenix did an amazing job playing the role. It’s completely different from any DC / Batman movies and probably not what you’d expect from a movie that plays in this universe.

Both movies are great psychothrillers.