If you liked Black Swan, you might also like...

Don't see why.

Birdman

I'm not sure what those have to do with Black Swan.

In superficial terms, essentially looking at the career narrative, it's the story of a repressed performer who reaches the pinnacle of her profession by growing as a person and showing discipline whilst, crucially, being big on sacrifice and excellence. In that respect films as diverse as Rocky and Whiplash are similar.

But I think the many themes are more interesting: sexual repression, arrested development, confused identity, the descent into madness etc. There are so many that a list of similar films could be extensive and extremely diverse, particularly if you include the general tone, but the following handful have sprung immediately to mind:

Persona (I kept thinking of this during Black Swan)
The Skin I Live In
Mulholland Drive/Lost Highway
Perfect Blue
The Machinist
Barton Fink
Various other Aronofskys
All About Eve (loose remake Showgirls is probably even more similar)
Fight Club
Vertigo

It strikes me how many of these are modern films. Maybe these are modern themes.....?