Natalie Portman's 'Black Swan' Physique Gave Emily Blunt 'Anxiety'

Blunt, who also plays a ballerina in upcoming Matt Damon thriller, recalls marveling, 'That girl has some serious guns.'

[movieperson id="373628"]Emily Blunt[/movieperson] spent the end of 2009 training to be a ballerina for her role opposite Matt Damon in the 2011 sci-fi thriller, "The Adjustment Bureau."

The training regimen she thrust herself into was borderline brutal. "The tears did start to flow. I did cry a lot in pain," she told us months later.

Around the same time Blunt was pirouetting like a madwoman, Natalie Portman had also slipped on some ballet slippers for "Black Swan." Portman's film beat Blunt's to the screen and quickly became an awards-season fave. Blunt herself is a fan of the film, even if seeing Portman dance caused a bit of apprehension.

"I had a full anxiety attack after it but still loved the movie," Blunt laughed to MTV News while promoting the Christmas release "Gulliver's Travels." "That girl has some serious guns," she explained. "I was like, 'Wow, her back looks like a barrel of snakes.' She truly worked out and she looks incredible in the movie."

Blunt shouldn't sell herself short. She, too, trained intensely for "Adjustment Bureau," recruiting the artistic director of the modern-dance company Cedar Lake to teach her how to dance like someone who'd been doing it her whole life.

"It's definitely an endurance test, learning how to be a dancer," she said. "That is some lifestyle. That is day in, day out, hours and hours and hours a day, just crippling your body. It was the hardest thing I have ever had to do in my life. I am so happy I did it because I think it's probably a good thing, soul-building, to do something every day that terrifies and embarrasses you."

Check out everything we've got on "Gulliver's Travels."

For breaking news, celebrity columns, humor and more — updated around the clock — visit