Hottest stars under 30

Kristen Stewart

Kristen Stewart, otherwise known as Bella Swan from the Twilight Saga with Robert Pattinson.

Who will be the biggest stars of the new decade? We focus the spotlight on ten actresses under 30. Some already have solid Hollywood reputations, others have yet to make the step toward superstardom. Among our favorites are Rooney Mara, Kristen Stewart, and Megan Fox.

Rooney Mara

Rooney Mara, See Hollywood greats

Kristen Stewart

Kristen Stewart. Hollywood greats

Megan Fox

Megan Fox. Hollywood greats

Amanda Seyfried

Amanda Seyfried. Hollywood greats

Rooney Mara

Born: 1985 in Bedford, New York, a suburb of New York City.

Big career step: Chosen by director David Fincher to play Lisbeth Salander in the Dragon Tattoo trilogy of movies.

Quotes: I'm not at all funny. I can do dark comedy pretty well, but straight-up comedy, I don't know. I'm much darker. Ive been like that since I was three years old. For Halloween, my mom asked me what I wanted to be. I said Klara, the crippled girl in the movie Heidi.

Best movie: Social Network, about Facebook founder Mark Zuckerberg. Rooney plays Zuckerberg's girlfriend.

Worst movie: A Nightmare on Elm Street.

You might not know: Rooney started her own charity, Faces of Kibera, started after a post-high-school volunteer trip to Kibera slum in Nairobi, Kenya. She says: It's frustrating because there are so many nonprofits sprouting up everywhere, it's become a business opportunity. The people who need help aren't really getting it. So I started my own.

Kristen Stewart

Born: April 9, 1990 in Los Angeles, California.

Big career step: As Bella Swan in the Twilight Saga.

Quotes: The Twilight Saga is either going to make it easier for me to keep doing the things that I've been doing for almost ten years or it's going to drop me right on my ass and I'm going to keep doing the same thing that I've been doing which are tiny little independent movies that no one sees. No need to worry about being out of work, Kristen!

Best movie: Adventureland (2009).

Worst movie: The Messengers (2007).

Factoid: As of March 2010, the Twilight series of books by Stephenie Meyer has sold over 100 million copies worldwide, with translations into more than 30 languages.

Megan Fox

Born: May 16, 1986 in Rockwood, Tennessee.

Big career step: The movie Jennifer's Body really got Megan noticed. Director Jason Reitman says, I didn't know what to expect. When someone is that beautiful, you go in questioning whether she's going to have the goods ... but she has the goods. She's capable of great things.

Quotes: It's sick and twisted. Some girls love to go to the airport and have 50 paparazzi on them. I go to the airport and have a mental breakdown. But I just have to go balls to the wall and embrace it.

Best movie: Transformers (2007)

Worst movie: Jonah Hex (2010)

Factoid: Cosmopolitan journo Alison Prato writes: Megan is gorgeous. No, we mean gorgeous. Anyone who's seen her on camera knows that, but in person, it's a whole other level. She is so mind-bendingly stunning that, sitting there with her, we temporarily forget why we even bother with men.

You might not know: Megan does not like being compared to Angelina Jolie. People see a dark-haired girl with tattoos who's in an action movie, and it's 'She's the next Angelina.' But I have nothing in common with her. If someone were to tell me she's a vampire, I'd go 'Yeah, okay, totally.' How come Angelina doesn't look any different than when she did Tomb Raider? It's because she's actually a 900-year-old vampire. Ouch!

Go to: Keira Knightley, Keke Palmer, and Amanda Seyfried.

By Athina Simonidou