Black Swan, which stars Natalie Portman as a lesbian ballerina, and the lesbian moms flick The Kids Are All Right are among the films nominated on Tuesday for an Oscar best picture award.

Director Darren Aronofsky's much heralded thriller Black Swan took 5 nominations, including nods for best picture and director, while The Kids Are All Right received 4 nominations.

The film's leading ladies, Annette Bening and Portman, received best actress nominations for their roles.

Mark Ruffalo received a best supporting actor nom for his portrayal of biological father Paul in The Kids Are All Right. The film's writers, Lisa Cholodenko and Stuart Blumberg, have also been nominated for best screenplay.

Black Swan is also nominated in the film editing and cinematography categories.

Other entries in the best picture race include The Fighter, True Grit, The King's Speech, The Social Network, Inception, Toy Story 3, 127 Hours and Winter's Bone.

This year's Academy Awards will be co-hosted by James Franco and Anne Hathaway on February 27 and broadcast on ABC.