They will join the revolving panel of judges that includes returning referees Will Arnett, Dana Carvey, Ken Jeong and Rob Riggle.
Season 2 of the updated version of the iconic variety show is to premiere on the network June 21.
Canadian comedian Mike Myers plays a British character named Tommy Maitland to host the program.
"Performers, such as contortionists, singers, magicians, dancers, jugglers and dancing dogs, are just some of the dozens and dozens of acts that are set to impress our panel of three celebrity judges. If any of the judges deem an act to be less than worthy of a score, they can pick up a mallet and hit the giant gong that is hanging behind them and end the underwhelming performance," a news release said. "But if the judges are happy with the act, they will let it play out until the end and present their scores numerically from zero through 10."
The act with the highest score wins a trophy and cash prize.