Charlize Theron: I Was Tricked Into Dancing at the Oscars!

But why no Magic Mike moves? Find out!

Charlize Theron really didn't know what she was getting into when she accepted Seth MacFarlane's invitation to dance at the Oscars.

"I was sort of tricked into it," Theron just told me at the Governors Ball. "I thought it was going to be something smaller, like he pulls me up from the audience and we do a little spin. But then he was was like, 'Rehearsals start Monday!'"

So what was it like waltzing across the stage in front of a gazillion people worldwide?

Secrets from inside the Oscars: 5 things you didn't see on television

"Completely nerve-wracking," Theron said. "I thought I was going to have to wear one of my son's diapers!"

But then she gushed, "How could I not dance with Channing Tatum? He's so wonderful!"

But why didn't Mr. Tatum strip just a little bit? After all, Magic Mike was one of the biggest success stories last year in Hollywood.

"No," Theron said with a laugh. "He's so classy—and he's about to be a dad!"

Meanwhile, Catherine Zeta-Jones said she hope she gets another chance to do a musical soon. "I loved it," she said about performing "All That Jazz" tonight. "It was great to be back after 10 years."

See all the Oscar party fun!