Cameron Douglas and girlfriend expecting first child

The Douglas family tree keeps growing.

Cameron Douglas, son of Michael and grandson of Kirk, is expecting his first child with girlfriend Vivian Thibes, People confirmed Friday.

“Everyone is thrilled for him,” a source told the magazine. “Michael is looking forward to being a grandfather.”

Cameron, 38, and Brazilian-born yoga instructor Thibes, 39, have been together since before he went to prison.

The “Wall Street” star’s spawn was sentenced to five years for heroin possession and selling drugs (including methamphetamine) in 2010, but his term was extended after he admitted to smuggling drugs into prison. He was placed in solitary confinement from 2012 to 2014 at Maryland’s Cumberland Federal Corrections Institute.

Cameron was released to a halfway house in August 2016.

A source previously told Page Six, “Cameron will talk about his struggle being the son and grandson of Hollywood icons, and then his bad decisions which led him to jail, and then solitary confinement. He is staying low-key after his release and plans to spend time with his father and mother. He believes this is a new start, and a chance at a new life.”