Updated

On Monday night’s “Late Show with David Letterman,” actor Tom Hanks made a surprising announcement, revealing that he has been diagnosed with Type 2 diabetes.

“I went to the doctor and he said, ‘You know those high-blood-sugar numbers you’ve been dealing with since you were 36? Well, you’ve graduated. You’ve got Type 2 diabetes, young man.’”

Hanks is known for his drastic weight fluctuations for his on-screen roles, which could have contributed to his diagnosis.

“My doctor said, ‘Look, if you can weigh as much as you weighed in high school, you will essentially be totally healthy—will not have Type 2 diabetes,’” he told Letterman. “Then I said to her, ‘Well, I’m going to have Type 2 diabetes because there is no way I can weigh as much as I did in high school.’”

For the film “Castaway,” Hanks memorably dropped 55 pounds, according to CBS. For “A League of Their Own” he reportedly gained 30 pounds.

More On This...

The veteran actor recently starred “Captain Phillips,” which hits theaters on Oct. 11.

Click here for more from CBS.