Robert Downey Jr.
These days, Downey Jr. is one of Hollywood’s biggest stars and a box office giant. But this wasn’t always the case because he spent time in and out of rehab and jail. He had a bad upbringing because his father introduced him to drugs when he was just six years old (via Decider).
This unsurprisingly had a terrible impact on his life. He became one of Hollywood’s bad boys before he made the brave decision to turn sober. This changed his career because it also made it easier for production companies to insure him. The stability helped him become the legend that he is now.