 The WGA offered McQuarrie a credit, but he voluntarily took his name off when the final version was more in line with Hayter's script than his.Russell Crowe was Singer's first choice to play Wolverine, but he turned it down, instead recommending his friend, actor Hugh Jackman for the part.Jackman was an unknown actor at the time, while a number of more established actors offered their services for the role, with Singer casting Dougray Scott.