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 McKellar 2018-us-nationalbookfestival-danica-mckellar.jpg McKellar at the 2018 U.S. National Book Festival Born Danica Mae McKellar January 3, 1975 (age 43) La Jolla, California, U.S. Nationality American Education Bachelor of Science in Mathematics with honors (summa cum laude) Alma mater UCLA Occupation Actress, mathematics writer, education advocate Years active 1985–present Spouse(s) Michael "Mike" Verta (m. 2009–2012) Scott Sveslosky (m. 2014) Children 1 Website danicamckellar.com twitter.com/danicamckellar mckellarmath.com From 2010–2013 and 2018–present, McKellar voiced Miss Martian in the animated superhero series Young Justice. In 2015, McKellar was cast in the Netflix original series Project Mc2. She also appears in several television films for Hallmark Channel. She is also the current voice of Judy Jetson from The Jetsons since 2017 due to Janet Waldo's death in 2016. In addition to her acting work, McKellar later wrote six non-fiction books, all dealing with mathematics (as she has a bachelor's degree in math from UCLA): Math Doesn't Suck, Kiss My Math, Hot X: Algebra Exposed, Girls Get Curves: Geometry Takes Shape, which encourage middle-school and high-school girls to have confidence and succeed in mathematics, Goodnight, Numbers, and Do Not Open This Math Book.