Before They Were Vampires

Taylor Lautner (Jacob Black)

Taylor Lautner

landed parts in The Adventures of Shark Boy and Lava Girl 3D (left) and Cheaper by the Dozen 2 when he was just 13.
YOU MAY NOT KNOW: Lautner currently plays Jack Spivey in Your Own Worst Enemy. He's also a junior national champion in martial arts!

Kristen Stewart

landed the role of Jodie Foster’s daughter in the 2002 thriller Panic Room (left) at just 11-years-old.
YOU MAY NOT KNOW: Stewart was discovered by an Los Angeles agent after a performance in her grade-school Christmas play.

Hear more about Twilight from Kristen Stewart on EW.com.

Robert Pattinson

's first major role was in 2005's Harry Potter and the Goblet of Fire. He played Harry Potter's classmate Cedric Diggory.
YOU MAY NOT KNOW: Pattinson plays the plays the guitar and keyboard in a band with his sister Lizzy.

Watch an interview with Robert Pattinson on

EW.com.

Nikki Reed

started her career co-writing and starring in Thirteen with Evan Rachel Wood (left) and later went on to break the hearts of O.C. fans when she broke up long-time couple Marissa Cooper (Mischa Barton) and Ryan Atwood (Benjamin McKenzie).
YOU MAY NOT KNOW: She co-wrote Thirteen with Twilight director Catherine Hardwicke who recruited her for Twilight.

TONS MORE TWILIGHT!
Twilight Fashion
Six Degrees of Twilight
Girl About Town: Kristen Stewart

After a series of television appearances and movie roles including The Family Stone, Elizabeth Reaser's big break was as Rebecca Pope on Grey's Anatomy. The actress guest starred on 17 episodes and was nominated for an Emmy.
YOU MAY NOT KNOW: She has a bachelor's degree in Fine Arts from Juilliard.
 

He played Mike Dexter (second from right) in the 1998 classic high school party movie Can't Hardly Wait alongside Seth Green and Jennifer Love Hewitt.
YOU MAY NOT KNOW: Facinelli has three children with wife 90210 star Jennie Garth.

See more cast pictures and share your thoughts on

EW.com.

TONS MORE TWILIGHT!
Twilight Fashion
Girl About Town: Kristen Stewart
Six Degrees of Twilight