Every night until the shutdown is over, Kimmel plans to help out an unpaid federal worker by giving them a job on the show. He started on Monday by picking out a new tambourine player.
John Kostelnik is a federal law enforcement officer at the Federal Correctional facility in Victorville, California, and he's the president of the local union. He told Kimmel he objects to being used as a pawn in the government shutdown.
"Have fun with it," Kimmel advised him as he took his place with the rest of the band. "Really go wild."
This shutdown began on Dec. 22, making it the longest shutdown since the '90s.
RELATED: How long will it last? A look back at other recent federal government shutdowns