By Wendy Mitchell
Updated January 07, 2010 at 09:00 AM EST

James Franco is set to star in Danny Boyle’s mountaineering film 127 Hours, Variety reports. Boyle’s follow-up to Oscar-winning Slumdog Millionaire is based on the true story of climber Aron Ralston, who had to amputate his arm during a 2003 climb.