POPSUGAR Entertainment Will Arnett David Cross Joins Running Wilde to Play Opposite Arrested Development Costar Will Arnett Arrested Development Reunion! Cross Joins Running Wilde by Entertainment 7/19/10 4 Shares Like us on Facebook Gob Bluth is about to get a little help from his brother-in-law — David Cross is joining Will Arnett and the rest of the cast of Running Wilde as a series regular! Cross will play a radical environmentalist (a part that originally belonged to a different actor in the show's pilot). With two former Arrested Development stars coming together this Fall, could we be in store for more cameos on the newbie show? Portia de Rossi seems to be available . . . Source: WireImage Read More Running WildeTV NewsWill ArnettDavid CrossTV Will Arnett This Knicks Game Looks Like It Was Quite the Courtside Party Watch the Arrested Development Cast Age Right Before Your Eyes Conan O'Brien Stops His Show to Break the News of Robin Williams's Death The Strangest Teenage Mutant Ninja Turtle Facts We Could Find Get the scoop with our daily newsletter TV Young Hollywood Movies A-Listers Sign up with By signing up, I agree to the Terms and to receive emails from POPSUGAR.