Danica Mae McKellar (born January 3, 1975[1]) is an American actress, mathematics writer, and education advocate. She played Kevin Arnold's on-off girlfriend Winnie Cooper in the television series The Wonder Years.Danica McKellar2018-us-nationalbookfestival-danica-mckellar.jpgMcKellar at the 2018U.S. National Book FestivalBornDanica Mae McKellarJanuary 3, 1975 (age 43)La Jolla, California, U.S.NationalityAmericanEducationBachelor of Science in Mathematics with honors (summa cum laude)Alma materU