Darren Aronofsky first became interested in ballet when his sister studied dance at the High School of Performing Arts in New York City. The basic idea for the film started when he hired screenwriters to rework a screenplay called The Understudy, which was about off-Broadway actors and explored the notion of being haunted by a double. Aronofsky said the screenplay had elements of the film All About Eve, Roman Polanski's film The Tenant, and Fyodor Dostoyevsky's novella The Double. The director had also seen numerous productions of Swan Lake, and he connected the duality of the White Swan and the Black Swan to his script.When researching for production of Black Swan, he found ballet to be "a very insular world" whose dancers were "not impressed by movies". Regardless, the director found active and inactive dancers to share their experiences with him. He also stood backstage to see the Bolshoi Ballet perform at the Lincoln Center for the Performing Arts.

Aronofsky called Black Swan a companion piece to his previous film The Wrestler, recalling one of his early projects about a love affair between a wrestler and a ballerina. He eventually separated the wrestling and the ballet worlds as "too much for one movie". He compared the two films: "Wrestling some consider the lowest art—if they would even call it art—and ballet some people consider the highest art. But what was amazing to me was how similar the performers in both of these worlds are. They both make incredible use of their bodies to express themselves."[6] About the psychological thriller nature of Black Swan, actress Natalie Portman compared the film's tone to Polanski's 1968 film Rosemary's Baby,while Aronofsky said Polanski's Repulsion (1965) and The Tenant (1976) were "big influences" on the final film.Actor Vincent Cassel also compared Black Swan to Polanski's early works and additionally compared it to David Cronenberg's early works.