The second season of 90210, an American television series, premiered in the U.S. on September 8, 2009 and ended on May 18, 2010. The season picks up at the end of summer after the events of last season's dramatic prom party. Rob Estes, Shenae Grimes, Tristan Wilds, AnnaLynne McCord, Ryan Eggold, Jessica Stroup, Michael Steger, Jessica Lowndes, and Lori Loughlin all return as series regulars from season one, while Dustin Milligan was released from his contract for "creative reasons".

Rob Estes is an American actor. He is known for his roles as Harry Wilson on the teen drama series 90210, as Sgt. Chris Lorenzo on the crime drama series Silk Stalkings, and as Kyle McBride on the primetime soap opera Melrose Place.