Robert Downey Jr.

Robert John Downey, Jr. is an American actor who portrayed Tony Stark/Iron Man in Avengers: Infinity War, Captain Marvel, Avengers: Infinity Gauntlet,  Iron Man 4, Avengers: Wrack of Dormammu, Black Widow, and Captain Marvel: Attack of Supreme Intelligence. 

Biography
Robert Downey Jr. was born on April 4, 1965 in New York. He was the son of Robert Downey Sr. and Elsie Ann Ford. He started acting in 1970. When Downey Jr. was a child, he was surrounded by drugs. His father, a drug addict, allowed Downey to use marijuana at age six, an incident which his father has said he now regrets. Downey later stated that drug use became an emotional bond between him and his father: "When my dad and I would do drugs together, it was like him trying to express his love for me in the only way he knew how." Eventually, Downey began spending every night abusing alcohol and "making a thousand phone calls in pursuit of drugs."