The actress recently spoke out about playing the evil witch, and revealed the personality and drive behind her character.
"It was a fun idea to be playing someone who is really, really bad. I can't think of any roles that I've had like that before... She's really, really a bad person and she revels in being bad. It's a Disney film, so I shouldn't say she is 'turned on' by evil, but that's what it is like... She enjoys it, like the meaner she is the more pleasure she gets.
The film centers on small-time magician Oscar Diggs (James Franco), who after one to many scams finds himself thrown into the fantastical Land of Oz. There he transforms himself into the powerful Wizard and finds a way to turn himself into a better man.
Oz: The Great and Powerful was released March 8th, 2013 and stars James Franco, Mila Kunis, Rachel Weisz, Michelle Williams, Zach Braff, Bill Cobbs, Joey King, Tony Cox. The film is directed by Sam Raimi.