“Giant Baby” is about Madison “Maddie” Banks (Alley), a Broadway star whose life is turned upset down when her long-lost son, Arlo (Eric Petersen), shows up looking to reconnect after the death of his adopted mother. Richards plays Maddie’s limo driver, and Perlman plays Maddie’s assistant and best friend. Gilles Marini has been cast as a guest star/potential recurring role as Maddie’s chef.
Richards starred as Kramer on “Seinfeld” for nine seasons, earning him three Emmys. And except for the short-lived “The Michael Richards Show” in 2000 and the “Seinfeld”-themed arc on “Curb Your Enthusiasm,” he has steered clear of TV. “Giant Baby” would mark his first regular series role in more than a decade.