Height: 5'9"

Ain't No Mountains Heigl-nough: As the voluptuous Dr. Izzie Stevens, she represents the only silver lining for guys who get stuck watching Grey’s Anatomy with their ladies every Thursday night. Thankfully, director Judd Apatow took Katherine out of her shapeless scrubs for her starring role in Knocked Up, which you can watch repeatedly on DVD as payback starting tomorrow. Now if only Apatow could get Sandra Oh out of her shapeless face.

Get more of Katherine in her Today's Girl Galley.
Then take a Knocked Up–inspired look at the pluses and minuses of being a dad.

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Katherine Heigl

Katherine Heigl

Katherine Heigl

Katherine Heigl

Katherine Heigl

Katherine Heigl

Katherine Heigl

Katherine Heigl