Their Judge Cuts round begins on Tuesday, July 12. The four will rotate in at the table and buzzers with regular judges Simon Cowell, Heidi Klum, Mel B and Howie Mandel.
Nick Cannon hosts the highly rated "AGT."
"America's Got Talent" is produced by FremantleMedia North America and Syco Entertainment. Cowell, Sam Donnelly, Jason Raff, Trish Kinane and Richard Wallace are the executive producers.
The "Got Talent" format, created by Cowell and co-owned by FremantleMedia and Syco globally, can be seen in 190 markets worldwide.
"AGT" will air on both Tuesdays and Wednesdays at 8 p.m. on NBC, beginning with the Judge Cuts round.