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Oscar-winner Tom Hanks has Type 2 diabetes.

"Late Show" host Dave Letterman Monday night asked Hanks, who was looking rather slimmer than usual, about his weight.

The legendary actor, 57, admitted that he has been dealing with high blood sugar since he was 36, around the time he made "Forrest Gump," and recently got some startling news during a doctor's visit.

His doctor told him, "Well, you've graduated. You've got Type 2 diabetes, young man."

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Hanks immediately followed up the news by telling Letterman it's controllable, but morbidly joked, "Well, something's going to kill us all, Dave."

His doctor added that if Hanks could weigh as much as he did in high school, he would essentially not have diabetes anymore.

"Then I said to her, 'Well, I am going to have Type 2 diabetes,'" the "Captain Phillips" star joked.

How to Walk Away From Diabetes

Type 2 diabetes is the most common form and makes up about 90 percent of diabetes cases. It's usually managed by increasing exercise and improving one's diet. If that doesn't lower the blood glucose level, then insulin might be needed.

Other celebrities with diabetes include Halle Berry, Randy Jackson and Drew Carey.

Type 1 diabetes is the less prevalent form of the disease, in which there is a total insulin deficiency and can be fatal if not controlled with supplemental insulin.