L-R: Danica McKellar & Dan Lauria | Photos: Crown Media/FOX

It’s been 25 years since “The Wonder Years” went off air, so I guess you could say the upcoming reunion between two of its stars is long overdue.

As you might already know, Danica McKellar is returning to the Hallmark Channel this Christmas to lead “Christmas at Grand Valley” — but, Entertainment Tonight has learned that her former ‘Wonder Years’ co-star, Dan Lauria, will be joining her in the holiday film!

Synopsis: Burned out from the hubbub of the Chicago gallery world, artist Kelly (McKellar) returns home to the picturesque Grand Valley just in time for Christmas. Maybe her favorite town’s shining season will reinvigorate her love of art and guide her down her next path. Leo (Brennan Elliott), businessman and all-star dad to his children, struggles to balance his time this holiday season. When he is assigned to review a hotel in Grand Valley for its value, he sees this as the perfect opportunity for a Christmas family vacation. It isn’t long until Kelly and Leo’s worlds collide. As Kelly re-experiences her favorite Grand Valley traditions with Leo and his children, she begins to find her way back to her passion for art.

Laura will play McKeller’s father, Frank Riley, the town diner owner who has been dubbed “Mayor of Christmas” by the town because of his love and dedication to the most ‘wonderful’ time of the year.