MIRACLE U-TURN IFOR MICHAEL'S STRUNG-OUT SON!

PROUD papa Michael Douglas is overjoyed firstborn son Cameron has battled back his drug demons and turned his life around, sources squeal.

“Michael was wracked with guilt that he failed Cameron as a father,” confides a family friend.

Cameron, 44, is the only child of the Oscar winner and first wife Diandra Luker and was just 17 when his parents divorced. The tattooed troublemaker was arrested multiple times for drug offenses — and served seven years in prison!