Black Swan - Ending Explained

The Twist: In the climax, Nina believes she gets into a fight with Lily in her dressing room and stabs her with a shard of a mirror. She hides the body and performs the Black Swan act flawlessly, physically transforming (in her mind) into a bird.

The Reality: After the act, she returns to her room to find the 'body' gone. The real Lily knocks on the door to congratulate her, alive and well. Nina realizes she never fought Lily; she fought a hallucination of herself and stabbed her own stomach.

The Ending: Despite the mortal wound, Nina insists on finishing the ballet. She dances the final act as the White Swan, who commits suicide. She throws herself onto the mattress off-stage. As the cast and Thomas gather around her, they see the blood spreading. Nina does not ask for help; she simply stares at the lights and whispers, 'I was perfect,' before the screen fades to white. It implies she likely dies, having sacrificed her life for that one moment of perfection.

Psychosis vs. Supernatural: While most view the film as a depiction of paranoid schizophrenia or severe psychosis (where the transformation is all in her mind), some readings suggest a magical realism element where Nina literally metamorphoses into the swan entity.

The 'Death' Ending: The ending is ambiguous. The literal reading is that Nina bleeds to death from a self-inflicted stab wound. An alternative metaphorical reading is that the 'Nina' who was the terrified little girl has died, and she has been fully consumed by her art/role, regardless of physical survival.

Lily as a Figment: A more extreme theory posits that Lily herself (or at least the version Nina interacts with most) might not exist as presented, functioning entirely as a projection of Nina's desires, though the presence of the 'real' Lily at the end contradicts this being entirely true.