Going back to school this fall just got a whole lot cooler. Sophia Bush, Brody Jenner, Cody Linley, AnnaLynne McCord, Solange Knowles and Good Charlotte's Joel Madden are getting ready for the back-to-campus season with an all-new Op campaign. Read on for more!

The TV, film and music personalities are uniting for "OPen Campus" to show off what's going to be in style for back to school, with a campaihn shot at University High in Los Angeles by photographer Larry Bartholomew.

The campaign -- which debuts this fall, available exclusively at Walmart -- showcases the stars cheering on the bleachers, running down the steps of the school, moving on the football field and hanging out on a custom solar-powered, vintage Op bus by West Coast Customs. The funky, decked-out bus features a performance stage on the roof, recycled cork floors, skateboards and surfboard décor, a gaming system and more.

Watch ET for more with the stars and Op!