Josh Henderson - pictured, a former Desperate Housewives star and ex-boy toy of Paris Hilton - is set to appear on 90210.

He'll appear as Sean, the son of Harry and Naomi's mother, Tracy.

Look for Sean to first appear on 90210 in November. He'll be discovered by the private investigator hired by Tracy and he'll be a quasi orphan; Sean's parents have died in a car accident.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.