
Danica Mae McKellar (born January 3, 1975) is an American actress, author, and education advocate. She is best known for her role as Winnie Cooper in the television show The Wonder Years, and later as author of the three The New York Times bestsellers, Math Doesn't Suck, Kiss My Math, and Hot X: Algebra Exposed, which encourage middle-school girls to have confidence and succeed in mathematics.
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Where Hope Grows
2014 · as Susan Malcolm

Flatland²: Sphereland
2012 · as Aero (voice)

Sidekicks
1992 · as Lauren

Scooby-Doo! Abracadabra-Doo
2010 · as Madelyn Dinkley (voice)

Crown for Christmas
2015 · as Allie Foster

DC Showcase Original Shorts Collection
2010 · as Sally (segment "The Return of Black Adam") (voice)

Tasmanian Devils
2013 · as Alex

Superman/Shazam!: The Return of Black Adam
2010 · as Sally (voice)

Have We Met This Christmas?
2025 · as Katie Stone

The Wrong Woman
2013 · as Ellen Plainview

Camp Cucamonga
1990 · as Lindsey Scott

Perfect Match
2015 · as Jessica

Love and Sunshine
2019 · as Ally Craig

DC Super Hero Girls: Hero of the Year
2016 · as Frost (voice)

Inspector Mom
2006 · as Maddie Monroe

Intermission
2004 · as Sleepwalker

Raising Genius
2004 · as Lacy Baldwin

Wedding Bells
2016 · as Molly Quinn