Robert Downey Jr.
Downey is known best for his monumentally successful roles in the Iron Man and The Avengers movies – however, in recent interviews he’s opened up about his dark past. Getting high since he was a kid, it’s a wonder he was ever able to stop – but he did, thanks to rehab.
In 1996 when police pulled Downey over on a traffic stop, they found heroine, cocaine, crack cocaine, and an unloaded .357 Magnum in his car. He was then also famously found passed out in his sons bed some time later. Downey went on to escape from rehab twice, and eventually went to jail for a year in 1999.
Finally after 2 more arrests he decided it was time to change and checked himself into rehab one last time. Since then he’s been clean, and also staggeringly successful as you can see from his latest films.