Katharine Hope McPhee (born March 25, 1984) is an American pop singer, actress, and model who was the runner-up on the fifth season of American Idol in 2006.
Born in Los Angeles, California, McPhee moved with her parents and sister to the Sherman Oaks neighborhood at age 12. McPhee has been singing since the age of two. McPhee graduated in 2002 from Notre Dame High School. At Notre Dame High School, McPhee was a swimmer and a thespian. She performed in school plays with her elder sister Adriana; both sisters were Homecoming Princess nominees in their senior year. Afterward, McPhee attended Boston Conservatory for three semesters, majoring in musical theater.