ET Spotlight: The Ladies of 'Oz'

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Rachel Weisz, Mila Kunis and Michelle Williams transform into the naughty and nice witches of Oz The Great and Powerful, in theaters March 8, and the tantalizing threesome are opening up to ET about the fantasy roles!

Pics: New Bewitching 'Oz the Great & Powerful' Posters

Oz also stars James Franco as Oscar Diggs, a small-time circus magician and flimflam man with dubious ethics. Hurled away from dusty Kansas to the vibrant Land of Oz, he first thinks he’s hit the jackpot -- until he meets three witches, Theodora (Kunis), Evanora (Weisz) and Glinda (Williams), who are not convinced he is the great wizard everyone's been expecting.

Video: Making the Wonderful World of 'Oz'

Reluctantly drawn into the epic problems facing the Land of Oz and its inhabitants, Oscar must find out who is good and who is evil and put his own magical talents to the test to transform himself not only into the great and powerful Wizard of Oz, but a better man as well.