Guest Stars Connor Paolo as Eric van der Woodsen Nicole Fiscella as Isabel Coates Robert John Burke as Bart Bass Amanda Setton as Penelope Shafai Matt Doyle as Jonathan Whitney Chuck Cooper as Horace Rogers Ariel Foxman as Himself Honor Brodie as Herself Co Starring Whitney Vance as Kelsey Zach Poole as Instyle Reporter Uncredited Kristen Bell voices Gossip Girl