John Tesh says it’s a miracle that he’s alive.

The “Entertainment Tonight” alum told Page Six in an exclusive interview that in 2015, he was diagnosed with “a rare form of cancer.”

“I was given 18 months to live,” he shared. “So, I’ve been fighting cancer successfully, still fighting it. It’s still under treatment, on and off.”

The former TV personality explained that he has a “rare form of prostate cancer, which is metastatic now.”

That means Tesh is never really in remission but rather “stable, which, he admitted, is a frightening thought.”

“They will let it grow for a little bit,” he shared, “and then get me back on treatment, back and forth. It’s called pulsing, and it’s scary until you get used to it because it’s like, ‘Why am I living with cancer?'”

Naturally, Tesh credits his doctors at the MD Anderson Cancer Center in Houston for extending his life, but he also thanks his wife, Connie Sellecca, whom he’s been married to for 34 years.

“Without my wife Connie, who has been my advocate over the years, I wouldn’t be talking,” he revealed. “I’d be dead. I would have been dead in 2015.”

The co-host-turned-musician also credits his faith with keeping him alive.

“We discovered in 2015 several scriptures in the Bible which were related directly to healing,” he divulged. “One of them was Mark 11:23, which was incredibly powerful and I have it tattooed on my arm.”

Meanwhile, Tesh, who gave up TV hosting duties in 1996 to concentrate on music, is still busy performing and writing music.

He recently performed his now-iconic NBA on NBC basketball theme “Roundball Rock” at the All-Star Game.

Besides music, Tesh also hosts a radio show, “Intelligence for Your Life,” which is heard on 350 stations.