Image caption Douglas stars in Wall Street: Money Never Sleeps

Hollywood actor Michael Douglas is being treated for a tumour in his throat, his publicist has said.

The Wall Street star, who is married to actress Catherine Zeta Jones, will undergo eight weeks of radiation and chemotherapy.

"I am very optimistic," the 65-year-old Oscar winner told People magazine.

The actor's spokesman told the publication that doctors expect him to make a full recovery. Douglas stars in a Wall Street sequel, out this autumn.

In June, Douglas's son from his first marriage, Cameron, was sentenced to five years in prison for dealing methamphetamine and possessing heroin.

Douglas also has two children from his marriage to Zeta Jones, whom he married in 2000.

The actor is the son of film legend Kirk Douglas.

His other films include Romancing the Stone, The American President, Basic Instinct, Falling Down and Traffic.