20 Celebrities Who Have Battled Addiction In Rehab
19. Robert Downey Jr.
The Iron Man was ordered to go to rehab in 2001 after he was found wandering barefoot in L.A. Tests showed that he had high amounts of cocaine in his system. But Downey had been down that road many times before (the metaphorical road, not the literal one): the actor was a notorious partier for years and years before he was faced with getting clean and sober or being hauled off to jail.