Jennifer Lawrence's 'Hunger Games' Uncertainties

At just 21 years old, Jennifer Lawrence has landed probably the most coveted role in Hollywood -- playing heroine Katniss Everdeen in the feverishly anticipated The Hunger Games, based off of the best-selling book by Suzanne Collins known for its huge (and very passionate) fan base.

But though becoming the next Kristen Stewart or Rooney Mara would probably be a no-brainer for any actress in the business, Lawrence (no stranger to attention, having been nominated for an Oscar in 2011 for Winter's Bone) shares her surprising uncertainties in April's Glamour magazine about taking on the role that's sure to turn her into a global superstar.

"I gave myself three days," she says about her decision. "I knew from reading the books that I loved The Hunger Games. I just didn't know if it was worth changing my life for."

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And unsurprisingly, she's already started to notice the difference the role of a lifetime has made in her life.

"The people who used to ignore me at parties, now they're nice to me and kissing my ass," she reveals. "But nobody's staked outside my house. I wanted to make sure that when I said yes, I wouldn't regret it. And I don't regret it. I would have said no because I was scared, and then I would have been that bitter actress telling my grandkids, 'I'm the one that turned it down.'"

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But despite now having to live life in the public eye, Lawrence does realize just how fortunate she is.

"In some ways, it's a hard life, but it's a great professional life," she explains. "I'm doing what I love, and then I get months and months of rest. I have a lot of money for a 21-year-old. I can't stand it when actors complain."

Glamour's April issue hits newsstands March 6.