The Creedence Clearwater Revival frontman is officially joining Team Adam this season to help mentor Adam Levine's contestants during the competition, NBC confirms to PEOPLE exclusively.
"Hangin' with Adam, singing 'Lookin' Out My Backdoor' with him … [I'm] just having the time of my life right now. Adam has an incredible voice and I am honored that he asked me to join him," Fogerty says.
"I have great respect for the amount of work that goes into this show and the contestants that I got to hear sing, really impressed me."
This will be Fogerty's second Voice appearance – he appeared in season 8 where he performed alongside winner Sawyer Fredericks. It was previously announced that country star Brad Paisley will be Blake Shelton's adviser this season.
"It appears Adam has the winner," Fogerty says. "I saw something really unique and special. I can't give away details, but when this show airs I think the world will see for themselves and it won't be a secret for long."
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Season nine of The Voice returns Sept. 21 at 8 p.m. ET on NBC.