The 36-year-old revealed that her role as the Evil Queen has been "very fun", describing the project as "ambitious".
"I've been like a 12-year-old," Theron told Access Hollywood. "That's my castle, that's my house."
Theron went on to speak about her upcoming role in Young Adult, which could potentially land her an Oscar nomination.
"It's such a compliment, but you can't think about that stuff," Theron said of the Oscar buzz. "It's a really nice thing, but I feel like the great, great gift in this whole thing is the fact that I haven't worked in three years and… [I got to] come back and work with this kind of a character and have a director like Jason Reitman."
Theron recently claimed that she has never been single, saying that she has always been in a relationship since her teenage years.
She previously insisted marriage is not important to her, saying that she has no plans to wed in the near future.
Watch the trailer for Snow White and the Huntsman below: