Courteney with 'Friends' co-star Jennifer Aniston (Photo: Web)
While Sagal is best known for her time on 'Married With Children' and most recently for 'Sons of Anarchy', Cox has not made a noteworthy TV appearance since 'Cougar Town' wrapped in 2015.
Meanwhile, season nine of Showtime's longest-running series will see the series hit the 100th episode mark. Also starring Emmy Rossum, Ethan Cutkosky, Shanola Hampton, Steve Howey, Emma Kenney and Cameron Monaghan, 'Shameless' is scheduled to premiere next month.