‘The Wonder Years’ Star Danica McKellar and Her Abs Star in Avril Lavigne’s New Music Video

Hello, Winnie Cooper.

Some two decades after The Wonder Years bid adieu to the world of television, Danica McKellar has surfaced… for Avril Lavigne.

On Thursday, the ladies were spotted on a Los Angeles lot in full costume to film the music video for Lavigne’s new single “Rock N Roll.” The track is from the Canadian singer’s upcoming fifth studio album (and yes, it was co-written with her new hubby Chad Kroeger).

While Lavigne stuck with an army green dress and knee high boots, her co-star turned heads with an outfit that put her rock hard abs in the spotlight.

McKellar, now 38, owned it in a mini denim vest, a crop top, blue fishnet stockings, a short black leather skirt, giant hoop earrings and orange boots.

For those who haven’t kept up with all things Winnie Cooper, McKellar is a mother of one, is recently divorced and has written a number of math books for adolescent readers, including the 2012 release Girls Get Curves: Geometry Takes Shape.

Launch the gallery, above, for more set photos from Avril Lavigne’s music video.

[Lead image courtesy of Twitter/Avril Lavigne]