“He’s hanging in there,” White, 62, said. “He is a strong man and has such a will to conquer this.”
White then revealed Trebek, 78, told her about his diagnosis before he announced it publicly on March 6.
“We’re a family,” she explained. “We've been together for over 30 years. Even though ‘Jeopardy!’ is different from ‘Wheel,’ we're kind of the same."
"This got really bad," Trebek admitted to host Jane Pauley in a preview of the interview. "I was on the floor writhing in pain. It went from a 3 to an 11. And I just couldn’t believe. I didn’t know what was happening."
"And it happened three or four times a day while we were taping," he explained. "So that was a little — little rough on me."
Still, Trebek — who has been the host of "Jeopardy!" since 1984 — wanted to push through, despite one instance where he "barely" made it to his dressing room and ultimately "cried in pain" when he got there.
"And, the producers were very kind. They said, 'Look, if you don't wanna do the show, we'll just cancel taping.' I said, 'No. We're here. We're doing the shows,'" he insisted.
Fox News' Mariah Haas contributed to this report.