As Karen Walker would say, Honey, what is this?
The quartet played Will, Grace, Jack, and Karen in the beloved sitcom.
Messing tweeted a photo of their reunion with the caption, Only smiling because of where Erics hand is!

Credit: Debra Messing/Twitter
According to a tweet from McCormack, the reunion occurred last Wednesday.
See the photos below.
Will & Graceran for eight seasons from 1998 to 2006.
McCormack and Messing came back together a few years later in 2010 for EWs Reunions issue.
Obviously, were very comfortable with each other, Messingsaid at the time.
Watch a behind-the-scenes video from the issue below.