The Evolution Of Katherine Heigl: Track The 'One For The Money' Star's Career Through Photos

She's played a haughty human-alien hybrid, a plucky lingerie-model-turned-surgical-intern and an accidentally impregnanted television producer, and with today's release of "One for the Money," Katherine Heigl can add "Jerseylicious bounty hunter" to her eclectic resume. The actress stars in the big-screen adaptation of Janet Evanovich's romantic thriller, playing heroine Stephanie Plum, an out-of-work unmentionables saleswoman who takes a job as a recovery agent to make ends meet. (We're also betting she finds a bit of love along the way...) As Katherine returns to the big screen slinging a pistol and downing the Garden State's entire ration of Tastykakes, let's take a look back at her career.

Born November 24, 1978, in Washington, D.C., Katherine started out as a child model before making her film debut in the 1992 romance "That Night," starring Juliette Lewis, C. Thomas Howell and a young Eliza Dushku. Katherine played a character named...Kathryn. She went on to make a splash in her first starring role alongside French actor Gerard Depardieu in the 1994 comedy "My Father the Hero," playing a vacationing teenager who tries to impress her summer fling by telling him that her dad is really her lover. We did that all the time in high school!

Several movie roles ("Under Siege 2: Dark Territory," "Prince Valiant") followed before Katherine signed on to play the first of her TV Isabels in the teen extra-terrestrial series "Roswell." As half-human, half-alien Isabel Evans, she appeared on the show for three seasons until it was cancelled in 2002. But this E.T. didn't need to phone home—a mere three years later she landed the role that would make her the star she is today.

Katherine's turn as spunky doctor-in-training Isobel Stevens on the ABC medical drama "Grey's Anatomy" earned her accolades and the audience's adoration. Not surprising, considering Katherine was a pivotal part of one of the most heartwrenching moments ever on broadcast television. Ever. She earned an Emmy in 2007 for her work on the series, but a year later refused to enter her name for consideration because she didn't think she'd been given adequate material to work with. Rumors of an early discharge from Seattle Grace swirled for years before Katherine finally pulled the plug in 2010.

By then, however, Katherine had already established herself as a threat on the small screen and big screen. She broke out in an even bigger way in 2007 thanks to her role in the Seth Rogen raunch-fest "Knocked Up," which she followed up with a slew of fluffy rom-coms, "27 Dresses" and "Life as We Know It" among them.

Katherine's personal life also flourished. In December 2007, the actress wed musician Josh Kelley in a ceremony in Park City, Utah. Two years later, the couple welcomed adorable adoptive daughter Nancy Leigh (nicknamed Naleigh) into their family.

The 33-year-old seems to be easily juggling her many, varied responsibilities. In addition to "One for the Money," Katherine also has the film "The Wedding," with Amanda Seyfried and Robert de Niro, out this year, and has talked about a return to "Grey's Anatomy."

Click on any of the images above to browse our entire Evolution of Katherine Heigl gallery!

Will you be seeing "One for the Money" this weekend? Are you a Katherine Heigl fan? Sound off in the comments and on Twitter!