Actor Sean Hayes is reuniting with his former Will & Grace co-star Megan Mullally on his new Tv sitcom Sean Saves The World.

The actors played best friends Jack MCFarland and Karen Walker on the Emmy-winning series and now they're slated to share the small screen once again as siblings on Hayes' U.S. comedy.

Mullally will appear in this season's 17th episode, which is scheduled to shoot in February (14), according to

This will mark the first on-screen reunion for Hayes and Mullally since Will & Grace wrapped 2006.