Amanda Seyfried Talks Nudity, Relationships In Glamour (PHOTOS)

Amanda Seyfried covers Glamour's March 2012 issue and opens up about her personal life, competing with other twenty-something actresses for roles and why she'll probably never go full-frontal for a film -- even for one about a porn star.

"What surprised me is the amount of pubic hair!" she said about watching "Deep Throat" while researching her title role in the upcoming "Linda Lovelace" biopic. "I'm pretty sure I would never do a full frontal in a movie -- for personal reasons, I wouldn't really want to show that."

Seyfried is certainly pushing her boundaries for "Linda Lovelace," and admitted she sometimes feels pressure to compete for certain roles.

"But the funny thing is, the girls that I'm always up against for roles are pretty nice and cool, like Emma Watson," she said. "She's awesome. She's really funny and smart. And Carey Mulligan. It's flattering to be up against her because she's really good, and she's cool too...I think the era of the diva actress is coming to an end."

Though the single Seyfried's star power will likely rise thanks to her new "Linda Lovelace" and "Les Misérables" gigs, don't expect her to go boy crazy anytime soon. The actress told the magazine she's "terrified of being promiscuous."

Seyfried's been linked to other Hollywood actors, including Ryan Phillippe, but the actress admitted to the magazine that she hasn't been in love since she split from her ex-boyfriend and "Mamma Mia!" co-star Dominic Cooper.

"He was my last real boyfriend," she said. "We still joke about having kids, like, 'If it doesn't work out with other people, we might as well just have a child.' And there's a part of that that feels ... possible."

But there's definitely one Hollywood guy she's just friends with: Justin Timberlake. The two starred in last fall's "In Time" together, and Seyfried said she definitely sees why women are attracted to him.

"He seems so perfect, but you get to know him, and he's a good pal," she said. "He'll tell you what he really feels. But, you know, he's really famous, which has its downsides."

Check out Amanda's Glamour cover and photos below, and for more, head over to Glamour.

Check out some flashback photos of Amanda below:

Amanda Seyfried