Ed Helms, The Office and Josh Groban

Apparently music runs in the Bernard family.

The Office has cast singer Josh Groban to play the brother of a cappella lover and Dunder Mifflin employee Andy Bernard (Ed Helms), Deadline reports.

Groban, 30, slyly confirmed the news, tweeting: "The cast and crew of The Office are the coolest ever. #allimgonnasay."

Is The Office on your Watchlist? Add it and your other favorites now and never miss an episode

He joins Stephen Collins, who will play their dad, and Dee Wallace (E.T.) as the Bernard family matriarch.

Although he is best known for his pipes, Groban has appeared on TV multiple times — including Ally McBeal in 2001 and Glee in 2009. He most recently co-starred in the drama Crazy, Stupid, Love. alongside former Office boss Steve Carell.

The Office returns Thursday, Sept. 22 at 9/8c on NBC.