Gossip Girl actor Chace Crawford is lending his famous face to a public service announcement encouraging fans to donate their denim to help teen homelessness.

From January 26 to February 22, anti-homelessness charity Teens for Jeans is asking customers to drop off their jeans to any Aeropostale location for delivery to a local shelter. And to say thanks, the retailer will give patrons 25 percent off a new pair of jeans.