When you think about Maggie Gyllenhaal, you don't really think "big budget action flick star." But this indie queen has gone mainstream with her latest movie role -- Rachel Dawson in The Dark Knight. Yes, that's the part that Katie Holmes played in 2005's Batman Begins. Keep clicking to learn what it's like step into a role originated by another actress, plus get Maggie's favorite memory of working with Heath Ledger and much more.

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