Robert Downey Jr. is a prominent American actor, producer, and playback singer. Best known for his portrayal of Tony Stark in Iron Man, the superstar is one of the highest paid actors in the world, ranking in at number one from 2012 to 2015. After a promising start to his career as a child actor, Robert Downey Jr struggled with drugs and alcohol-related problems. However, he soon recovered and became one of Hollywood's most sought-after actors, starring in numerous blockbusters and winning several awards along the way.