Whoa, Winnie Cooper! Former Wonder Years star, Danica McKellar, popped up looking hotter than ever on the set of Avril Lavigne's newest music video "Rock N' Roll" in L.A. on Thursday, July 25. Dressed in a denim jacket, red high heel boots, blue fishnets, and wearing heavy eye makeup, Kevin Arnold's first crush is certainly all grown up. She also bared her midriff to show off her toned abs. 

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"My partner in crime @danicamckellar on the set today of my music video for #ROCKNROLL," Lavigne, 28, wrote. "So much fun!!" McKellar, 38, added, "Just had the best time shooting @AvrilLavigne's new video. And she is so sweet and fun! Made me feel like a rock star. ;)"

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Since her coming-of-age TV series went off the air in 1993, McKellar has gone on to graduate from UCLA with a BS in mathematics in 1998 and is a three-time New York Times bestselling author. She has continued to work in Hollywood, lending her voice to the animated series Young Justice and appearing on an episode ofABC Family's The Secret Life of the American Teenager.

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The actress filed for divorce from composer Mike Verta, after three years of marriage in June 2012. The pair have a 2-year-old son together, Draco.

This article originally appeared on Usmagazine.com: Danica McKellar From The Wonder Years Unveils Abs in Avril Lavigne Video