Olivia Wilde is a princess in real life, and now she's a princess in the new movie "Year One."

But her real-life title is waaaaay better than her movie one.

“I’m the Princess of Sodom [in the movie], which is a great thing to tell Mom and Dad," she tells the July issue of Maxim. "‘Who are you playing this time, sweetie?’ ‘I’m the Princess of Sodom!’ My poor parents.”

PHOTOS: Click for pics from Olivia's Maxim photo shoot, and more...

In real life her husband, the filmmaker Tao Ruspoli, is Italian royalty. “It’s kind of hilarious, because my husband and I are so not concerned with it. All it means to us is having an incredible family history. But it’s still funny. Everyone on set was like, ‘Princess of Italy, Princess of Sodom.’”

But Wilde made sure to bone up on her research for her role.

“In my family religion was reserved for weddings and funerals, so once I got the role I had to read up on my Cain and Abel," she said. "Plus, I had to know about Sodom, so I did a lot of research on sodomy. I’ll do anything for my craft.”

And what about being Megan Fox's famous girl crush? (Fox once famously said Wilde was so sexy "she makes me want to strangle a mountain ox with my bare hands.")

"She said, ‘I’ve had a girl crush on you for years, and I hope that doesn’t offend you,'" Wilde told maxim. "And I said, ‘Why would it offend me? I think it’s wonderful.’ Then I said something really nerdy like, ‘I should send you a thank you card!’ She said, ‘Yeah,’ and I just kind of withered. Thank you cards are not sexy!”

RELATED: Go to Maxim.com for more pics of Olivia Wilde.