What is Robert Downey, Jr.’s Net Worth? An American actor, producer, and singer, Robert Downey Jr. Robert Downey, Jr. are worth $300 million, according to the latest estimates. Robert Downey, Jr. is best known for his role as Iron Man in the Marvel Comics series of the same name. One of the highest-paid actors in … Continue reading Robert Downey Jr.’s Net Worth, Early Life, Career & More Details!