"I saw a picture of them a couple of days ago from when I was 19, and my boobs were way bigger. They were a D, and now they're a small C, because I lost weight," Seyfried says. "There was something so beautiful about the size of them. When I look back, I'm like, 'Why did I always give myself such a hard time?' Nobody gave me sh-t about it except me.'"
Seyried loves her assets, but she admits they can also pose problems. "They do get in the way a lot," the Les Miserables actress says. "Like, I wear a really small, tight sports bra when I go running . . . because they want to smack my chin."
Ironically, Seyfried appears fully-clothed in the magazine's annual Look Better Naked issue. Though she's been nude on camera before (in 2006's Alpha Dog and 2009's Chloe), the Pennsylvania native says she was initially nervous to play a porn star in the biopic Lovelace. To her surprise, Seyfried says the risque role actually improved her self-confidence.
"Maybe this is backwards, but because she found the power in herself and in her body at a point, it made me feel comfortable in my own skin in a way that I hadn't been," Seyfried says of playing Linda Lovelace, who starred in 1972's X-rated movie Deep Throat in addition to many, many other porn films."I've got parts of me that I wish were tighter, but I don't kill myself, because it's not worth it."
In the interview, Seyfried also addresses a reporter who once wrote that she has the face of an extraterrestrial. "I like that. I'd rather not be ordinary-looking," the Mean Girls star says. "I want something different about me. We all want to be originals."
The May issue of Allure is in on stands April 22.
Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics and more delivered straight to your inbox!