Katherine Heigl is an American actress and producer, best known for her role as Dr. Izzie Stevens on the popular television series Grey's Anatomy. Born on November 24, 1978, in Washington, D.C., she began her career as a model before transitioning to acting in the late 1990s. Heigl gained widespread recognition for her performances in romantic comedies, including 27 Dresses and The Ugly Truth. In addition to her acting career, she has produced several projects and is known for her advocacy work, particularly in the areas of animal welfare and adoption.