Robert Downey Jr, who celebrates his 60th birthday today, has had an incredible Hollywood career. After success on the big screen in the 1980s and 1990s, drug charges landed him in jail before getting sober in 2003 and making an incredible comeback as Iron Man in the Marvel movies, not to mention playing Sherlock Holmes twice. Earning over $400 million for playing Tony Stark in the MCU, the actor won an Oscar last year for his role in Sir Christopher Nolan’s Oppenheimer. Now as he gears…