Jill Zarin, Alex McCord, Kelly Bensimon and Cindy Barshop are out while Ramona Singer, Sonja Morgan and LuAnn "The Countess" DeLessups are in for season No. 5.
"We've had a fabulous run with all the ladies and appreciate them sharing their lives with our viewers," a Bravo representative told People. "It is a friendly departure among the other ladies and we continue to have ongoing discussions with them."
McCord told People that she and her ubiquitous husband, Simon, were "sad" about being off the roster, but were talking with Bravo about other potential projects.