90210 stars Jessica Lowndes and Matt Lanter are teaming up with DoSomething.org and Aeropostale to fight youth homelessness.

Beginning today do your part by bringing pairs of gently used jeans to any Aeropostale store – they’ll be donated to teens in need and you’ll get 25% off your next purchase of Aero jeans.

DoSomething.org and Aeropostale are hoping to donate one million pairs of jeans to homeless teens this winter. Last year, 620,000 pairs were collected and 200,000 were sent to Haiti to aid in earthquake relief.