Hollywood's hottest actresses are battling it out to join the new "Batman" cast - Keira Knightley, Natalie Portman, Anne Hathaway and Rachel Weisz are among the six stars vying for roles.
 
Director Christopher Nolan has also lined up a pair of blondes - Blake Lively and Naomi Watts - to meet with as he casts two leading ladies for "The Dark Knight Rises," the upcoming third installment of the superhero franchise.
 
According to Deadline.com, the super-secretive filmmaker is on the hunt for a female villain and a love interest for Christian Bale's Bruce Wayne.
 
Speculation has been rife about the forthcoming blockbuster's plot details, with recent reports suggesting Tom Hardy will play Batman's foe in the follow-up to 2008's "The Dark Knight."

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