Mila Kunis is one of our favorite faces to fawn over here at Complex, and, today, the Black Swan co-star has upped her hotness ante by officially signing on to Oz: The Great and Powerful. The prequel to The Wonderful Wizard of Oz by L. Frank Baum will show how the Wizard (James Franco) arrived in Oz and became the land's almighty ruler. Director Sam Raimi (Spider-Man) will place Franco's character in the magical realm and surround him with two sexy witches: Theodora (Kunis) and sister Glinda (yet to be cast).

The Wizard and Theodora start off as pals, but when the Wiz rejects Theodora's sexual advances (can you say WTF?), she joins the dark side with bad witch Evanora. Olivia Wilde, Amy Adams, Keira Knightley, Kate Beckinsale, and Rebecca Hall are all reportedly under consideration to play the other witches.

Until then we'll just daydream about what Kunis' witch costume will look like. The fantasy flick is on track for a 2013 release.

[Via Empire]