Dr. Isobel "Izzie" Stevens, played by Katherine Heigl, Izzie is the blonde roommate of Meredith and George. She grew up in a trailer park with her mother, who called her "Cricket". Izzie worked as a waitress as a teenager, but all her savings for college were spent on visits to pysics by her mom. As the relationship with her mom was estranged, she left home at the age of 16. So Izzie was forced to job as an underwear model for fictional designer Bethany Whisper to pay her way through medical school.Izzie is a very compassionate person, who sometimes gets too emotionally involved in helping her patients.