The host of The Colbert Report is reporting for comedic duty on The Office! Stephen Colbert will guest-star this season as Broccoli Rob, a former member of Here Comes Treble, Andy’s a cappella group, EW has learned. In the Halloween-themed episode, Andy (Ed Helms) discovers that the smarmy, competitive Broccoli Rob is singing a different tune about the history of the group and stirring up drama, which only intensifies the rivalry between these two frenemies.
Colbert — who worked with Helms and former Office star Steve Carell at The Daily Show —will pop up on the Oct. 25 episode. The ninth and final season of The Office begins tonight on NBC at 9 p.m.