Douglas is the offspring of father Michael and his first wife Diandra Luker
Cameron Douglas, son of actor Michael, could be facing life behind bars for allegedly selling drugs over a three-year period, it has emerged.
The 30-year-old occasional actor is accused of possessing and distributing forms of methamphetamine.
He was arrested in Manhattan on 28 July and later charged in federal court but the news has only just emerged from examining court records, AP has said.
Douglas faces a minimum 10-year sentence and a maximum of life.
Douglas is alleged to have received large quantities of methamphetamine - also known as "crystal meths" or "ice" - in California and sent them to New York between 2006 and 2009.
Douglas worked with accomplices, who are cooperating with US Drug Enforcement Administration, court records claim.
A further court date has not been set.
Cameron Douglas's mother is Diandra Douglas, nee Luker, who was married to Michael from 1977 to 2000.
Douglas's second and current marriage is to actress Catherine Zeta-Jones.
Cameron Douglas appeared with his father Michael and grandfather Kirk in the film It Runs in the Family in 2003, a comedy showing three generations of a dysfunctional family.
His other films are Adam and Eve, The Perfect Beat and Loaded, with Jesse Metcalfe and Chace Crawford.
His most recent project, the crime drama Beautiful Outsiders with Corey Feldman, sees Douglas both in front of and behind the camera as associate producer. The film is still in production.