Robert Downey Jr. gain more than 20 pounds of muscle in five months to look like he "had the power to forge iron". "Iron Man" was globally released between April 30 and May 3, 2008, grossing over $585 million worldwide and receiving rave reviews which cited Downey's performance as a highlight of the film. By October 2008, Downey had agreed to appear as Iron Man in two "Iron Man" sequels, as part of the Iron Man franchise, as well as "The Avengers", featuring the superhero team that Stark joins, based on Marvel's comic book series "The Avengers". He first reprised the role in
Robert Downey Jr. staff, and asked if he could produce or assist in an episode creation, as his son Indio is a fan of the show. The producers of the show accepted the offer and created the character of Patrick Pewterschmidt, Lois Griffin's long lost, mentally disturbed brother, for Downey. Downey signed on with publishers HarperCollins to write a memoir, which in 2006, was already being billed as a "candid look at the highs and lows of his life and career". In 2008, however, Downey returned his advance to the publishers, and canceled the book without further comment. In 2007, Downey appeared in