Nathan Lane and Christine Baranski previously appeared together in the film, The Birdcage (1996), and also off-Broadway in Lips Together, Teeth Apart, and The Man Who Came to Dinner.
Michael J. Fox (Louis Canning) & Jerry Adler (Howard Lyman) also worked together on episode 1.11, Dog Day Afternoon (1996), of Spin City (1996) as Mike Flaherty & the Police Commissioner respectively.
Matt Czuchry (Carey) & Christian Borle (Carter Schmidt) also worked together on episode 1.3, Summer (2016), of Gilmore Girls: A Year in the Life (2016) as Logan & Carl respectively.
Christian Borle reprises his role of Carter Schmidt in The Good Wife spin-off, The Good Fight (2017).
Jerry Adler (Howard Lyman) & Michael J. Fox (Louis Canning) also worked together on Rescue Me (2004), as Sidney Feinberg & Dwight respectively.