Busy Philipps, Greg Kinnear, Bobby Moynihan and Aidy Bryant will guest star in Season 4 of the comedy "Unbreakable Kimmy Schmidt," Netflix announced. Previous guests Jon Hamm, Amy Sedaris, Mike Carlsen, Zosia Mamet and Derek Klena will also return. The first six episodes of Season 4 are to premiere May 30 on Netflix, with the remaining seven to debut at a later date, the streaming service said. Created by Tina Fey and Robert Carlock, the show stars Ellie Kemper, Tituss Burgess, Jane Krakowski and Carol Kane. It follows a young woman who is starting a new life in New York City after years of isolation in a doomsday cult in Indiana.