Katie Holmes has turned down a $2 million deal to star in the sequel to 'Batman Begins'.

The actress was expected to reprise her role as Rachel Dawes alongside caped crusader Christian Bale for 'Batman: The Dark Knight' but has pulled out because of "scheduling conflicts".

Rumours have already circulated that Katie has been replaced by 'Wedding Crashers' actress Rachel McAdams for the comic-book adventure, also starring Heath Ledger as The Joker.

Katie has instead signed up to star alongside Queen Latifah in the comedy 'Mad Money'.

The movie - to be directed by Callie Khouri - follows three female janitors working at the Federal Reserve who plot a major heist.

The former 'Dawson's Creek' actress' move into comedy is believed to be part of her plan to re-launch herself, following her career break to marry Tom Cruise and have their daughter, Suri.