LOS ANGELES, Sept. 21 (UPI) -- Talk-show host Stephen Colbert is to guest star on the ninth and final season of the U.S. sitcom "The Office," EW.com reported.
"The Colbert Report" star will play Broccoli Rob, a former member of Here Comes Treble, Andy's a cappella singing group, in the Halloween-themed episode to air Oct. 25.
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