Whitford, who will appear in an episode titled "A Ring and a Miss," will play Hughie, an old friend of Ryan (Perry) and Steven (John Cho). Perry first tweeted the news Wednesday, saying, "Working with Bradley Whitford again is so much fun. I mean, I wish we weren't in a hot tub together, but you can't ask for everything."
On Studio 60, Whitford and Perry played the brain trust behind an SNL-esque sketch comedy show. Perry also worked with Whitford on The West Wing.
Go On returns Jan. 8 at 9/8c on NBC.