Mackenzie Phillips -- Addiction Counselor

6/26/2011 6:00 AM PDT
"Celebrity Rehab" alum Mackenzie Phillips is in the process of becoming a certified drug and alcohol rehabilitation counselor ... TMZ has learned. 

Sources connected to the actress tell us ... Phillips -- who famously struggled with substance abuse for years --- is roughly half-way through a certification program and hopes to use her experience to help struggling addicts acknowledge and defeat their demons. 

We're told Mackenzie's progress will be captured for a new reality show called "No Relapse" produced by powerhouse reality company 44 Blue ... and sources connected to the project tell us the show is already getting, "Strong interest from multiple networks."