Katherine Marie Heigl
(born November 24
) is an American actress and producer who is the wife of Josh Kelley
. She is best known for her role as Isabel Evans
on the WB
science fiction teen drama series Roswell
, and as Dr. Isobel "Izzie" Stevens
on the ABC
medical drama series Grey's Anatomy
For Disney, she portrayed Nicole in the 1994 Touchstone Pictures film My Father the Hero and Alexia "Ally" Wheaton in the 1996 Disney Channel Original Movie Wish Upon a Star. She also played Romy in the ABC Family TV movie Romy and Michele: In the Beginning.
Outside of Disney, she is well-known for voicing Andie in The Nut Job and its sequel.