"If it was up to me, I would say every guy should get tested after the age of 40, 45, especially if you have a family history," he told Today during his visit to the show last November. "If I hadn't taken this test, I wouldn't have known."
Stiller also stopped by Live With Kelly & Ryan on Wednesday, where he echoed those statements.
"There was a test I took called the PSA test that detected [the cancer], so I just wanted to get the word out about that," he shared. "What I learned was that a lot of the guidelines say that you don't necessarily have to take it. For me, it's what made the difference -- it could’ve been a lot worse."
"I was 47 when I took the test, but the guidelines say you should take it around 50," he added. "I say you should discuss it with your doctor."