Katherine Marie Heigl (pronounced /ˈhaɪɡəl/; born November 24, 1978) is an American actress. She is best known for her role on Grey's Anatomy and her starring role in the movie Knocked Up.

Heigl started her career as a child model with Wilhelmina Models before she turned her attention to acting. She made her debut in the coming-of-age film, That Night. Heigl appeared in the television series Roswell and movies including My Father the Hero before landing her break out role in Grey's Anatomy. Over the years, Heigl has established herself as a sex symbol and cover model appearing on numerous publications including Maxim, Vanity Fair and Cosmopolitan.

Heigl married Josh Kelley in Park City, Utah on December 23, 2007.