Stewart will join Colbert on the host's Late Show as he provides the good people of the United States a play-by-play of both the Republican and Democratic conventions, which begin Monday, July 18.
There's little detail as to how often Stewart will show up, or what exactly his guest role will be, but the hosts have never failed to entertain.
Vulture first broke the news that the former Daily Show host would rejoin his old friend. The two also joined forces in 2008 for Comedy Central's Indecision 2008: America's Choice.
Tune in to CBS on Monday at 11:30 PM for the big show.