Michael Douglas has a tumor in his throat and will undergo radiation and chemotherapy.
The Academy Award-winning actor's treatment is scheduled to last eight weeks.
The 65-year-old Douglas says he expects to make a full recovery. He told People magazine in a statement Monday he's "very optimistic." His publicist's assistant Eli Barach confirmed his condition to The Associated Press.
Douglas won an Oscar for "Wall Street" and appears this fall in the sequel, "Wall Street: Money Never Sleeps."