Michael Douglas is set to undergo radiation and chemotherapy after doctors discovered tumour in his throat.
Douglas, 65, will have eight weeks of treatment and is expected to make a full recovery, a spokesman for the Oscar-winning actor said.
“I am very optimistic,” the Telegraph quoted him as saying in a statement.
The actor, who has reportedly smoked in the past, is married to Welsh actress Catherine Zeta-Jones, 40, and they celebrated their 10th anniversary earlier this year.
The discovery of a tumour was the latest blow in a tough year for the Wall Street star.
He is now said to be spending as much time as possible with his wife and their two children Dylan, 10 and Carys, seven.
“My priorities have completely changed.”
“My marriage and my family come certainly before my career. I cherish the time with them,” he added.