Best known for her roles in American Graffiti, One Day at a Time and The Disney Channel show, So Weird, Mackenzie Phillips is the quintessential troubled child star. Her drug abuse began very early, when her rock n’ roll father from the group, The Mamas and the Papas, taught her how to shoot up drugs. Later, Mackenzie and her father, John, would have a consensual, incestuous sexual relationship for 10 years. Her downward spiral lead her to embarrassing collapses and firings. Succumbing to multiple near-fatal overdoses and accruing many arrests due to her drug possession, Mackenzie checked herself into rehab to straighten out her life. Today Mackenzie works as a drug rehab counselor.