Katherine Heigl is an American actress and former fashion model, born on November 24, 1978, in Washington, D.C. She began her career as a child model before transitioning to acting. Heigl is best known for her role as Dr. Izzie Stevens on the ABC medical drama "Grey's Anatomy," which earned her an Emmy Award in 2007. She has also starred in several popular romantic comedies, including "Knocked Up" (2007), "27 Dresses" (2008), and "The Ugly Truth" (2009). In addition to her film and television work, Heigl has been involved in various philanthropic efforts and is an advocate for animal welfare.