Katherine Marie Heigl is an American actress and former model. She began her career as a child model with Wilhelmina Models before becoming an actress, making her film debut in That Night and later appearing in My Father the Hero as well as Under Siege 2: Dark Territory. Heigl went on to receive the role of Isabel Evans in the WB drama Roswell, receiving nominations for the Saturn and Teen Choice Awards. From 2005 to 2010, Heigl played Izzie Stevens in the ABC medical drama Grey's Anatomy, a role that garnered him recognition and appreciation, including the Primetime Emmy Award for the Actress. Best Helper in a 2007 TV Series. She appeared starring in the films Knocked Up, 27 Dresses, The Ugly Truth, The Killer, Life As We Know It, Excessive Eve, Big and Unforgettable Wedding. Heigl has also starred in a number of limited release films, including Jackie & Ryan, Home Sweet Hell, and Jenny's Wedding.

Actress best recognized for her role as Dr. Izzie Stevens on Grey's Anatomy, for which she received a Primetime Emmy Award for Outstanding Supporting Actress in 2007. She also appears in Seth Rogen's 2007 comedy Knocked Up. She made a reappearance in 2017 as the star of CBS's Doubt.