Former Friends star Matthew Perry will join the show on March 25 for a multi-episode arc.
In addition, Michael J. Fox will reprise her role for the fifth time as attorney Louis Canning. stage and screen star Elizabeth Reaser will return as Will Gardner's ex-girlfriend, Tammy, and Dylan Baker will reprise his role as convicted wife-killer Colin Sweeney.
As previously reported, Tony Award nominee Jonathan Groff will play a man suing a software company after his sister disappears during a peaceful protest in Syria, Tony Award winner Bebe Neuwirth will play a judge, and stage and television star Merritt Wever will play the younger sister of Will Gardner.
Other stage actors scheduled to appear in upcoming episodes also include John Benjamin Hickey, Denis O'Hare, and Rita Wilson.
The Good Wife stars Julianna Margulies, Christine Baranski, Alan Cumming, Archie Panjabi, Chris Noth, Mary Beth Peil, and Matt Czuchry.