For the role Downey had to gain more than 20 pounds of muscle in five months to look like he "had the power to forge iron. has sung on several soundtracks in his films such as Chaplin Too Much Sun Two Girls and a Guy Friends and Lovers The Singing Detective and Kiss Kiss Bang Bang. In 2008 Downey played the role of Marvel superhero Tony Stark / Iron Man in the live action film Iron Man.
His performance was praised and he received a Golden Globe Award for Best Performance by an Actor in a Supporting Role in a Series Miniseries or Television Film. In 2009 he played the title character in Guy Ritchie's Sherlock Holmes and again in 2011's Sherlock Holmes: A Game of Shadows. (born April 4 1965) is an American actor who made his screen debut at the age of five appearing in his father's film Pound.