Mila Kunis: 'I'm Much More Naive Than I Let On'

At the grandiose premiere for the fantasy/adventure film Oz the Great and Powerful--which included a hot-air-balloon entrance from James Franco--actress Mila Kunis, who plays "The Wicked Witch of the West," revealed an unexpected similarity to her character.

In the film, which takes a new spin on the classic Wizard of Oz tale by warping back to the time before the original storyline takes place, Kunis plays a naïve version of The Wicked Witch of the West.

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She revealed on the yellow-brick-carpet premiere of Oz that although she may seem like an entirely confident and sophisticated woman, there is a part of her that relates to her naïve character.

"Oddly enough, I think I'm much more naïve than I let on to be," the 29-year-old actress said, then discussing her character. "She's a smart, naïve girl. I think she just chooses to look at the good in people."

Rachel Weisz, who also plays one of the film's three witches, said that she felt that she could relate to her character, "The Wicked Witch of the East," as well. As she assesses, everyone can relate on some level to wickedness.

VIDEO: Watch the Great and Powerful 'Oz' Trailer!

"I just get to be really, really bad and cruel. The thing about real life is you can't really be bad because people get hurt; the good thing about films and drama is you can be bad and it's just make-believe," Weisz said. "...I think we're all bad but we keep it under control, but I didn't have to. I unleashed by badness. I loved it. It's very fun being bad."

Among the film's stars who graced the well-themed premiere and posed for pictures with ET's Rob Marciano in our mirror with a camera behind it supported by our friends from Twitter was James Franco, who was thrilled to have been a part of the film after previously working with director Sam Rami on Spider-Man and other films.

"It was pretty much a once-in-a-lifetime experience," Franco said, "but also, it felt like I was coming back home. Sam Rami is a director I've worked with four times, so it felt like I was working with family, I guess."

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Watch the video above to see all the stars of Oz the Great and Powerful, which is in theaters March 8.