Danica Mae McKellar (born January 3, 1975), is an American actress best known for her role as Winnie Cooper in the television show, The Wonder Years.

Born in La Jolla, California, McKellar and sister Crystal McKellar have maintained a friendly competition to see who gets more acting jobs. In fact, when the actress who would play Winnie had to be chosen, the only two actresses who were still in competition were the McKellar sisters.