@Ian Keldon your statements about Singer are incorrect as was pointed out. He came up with the story treatment used as the basis for the script, and helped cast the film, and almost nearly directed the movie, but couldn't get out of his "Jack the Giant Killer" iron clad contract with Warner Bros. He also consulted with Vaughn on the film as well. So again, without his original pitch to Laura Donner this film would not have happened as it did. He also voiced his disappointment and concern when the WGA announced it's accreditation of the credits for the film and left out Jamie Moss who was responsible for writing the first draft of the script based on his treatment I believe and instead gave story credit to Sheldon Turner. All you have to do is conduct a google search to see how much Bryan Singer was involved in this movie. As I said, he almost directed it.