U.S. actor Tom Hanks has revealed that he is suffering from Type 2 diabetes, the form of the disease that usually develops in adulthood.

During a Monday night appearance on the "Late Show With David Letterman," on CBS, the two-time Oscar winner commented that recently his doctor informed him that he had moved from the prediabetic phase to actually having the disease.

"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,'" Hanks told Letterman. "'You've got Type 2 diabetes, young man.'"

Diabetes is a disease where the level of glucose - or sugar - in the blood is very high, according to the specialized Web site Medline Plus. With Type 2 diabetes, the most common form in the general population, the body cannot produce or use insulin well.

Occasionally, a person's weight is a factor in the disease, and although Hanks appeared relatively slender on Letterman's program, his weight has fluctuated over the years due to the movie roles he took.

Particularly noteworthy in that regard were the films "Cast Away" (2000) and "Philadelphia" (1993), in which Hanks slimmed down markedly to better portray his characters.

Hanks said that the disease can be controlled with a healthy diet, exercise and regular blood sugar testing. EFE