Mullally took to Twitter to share a new photo of the crew back together.
"Lunch," she captioned the pic of herself laying across the laps of Sean Hayes and Eric McCormack.
NBC announced last month that the Will & Grace revival was official a go, crediting the video the cast filmed in September as the catalyst for the 10-episode reboot.
Creators Max Mutchnick and David Kohan will be returning as co-showrunners and executive producers, with legendary TV director James Burrows on board to direct and executive produce.