Woody Harrelson has joined Julianne Moore and Ed Harris in HBO Films’ Game Change, produced by Tom Hanks and Gary Goetzman’s Playtone. The movie, directed by Jay Roach, follows John McCain’s (Harris) 2008 presidential campaign, from his selection of Alaska Gov. Sarah Palin (Moore) as his running mate to their ultimate defeat in the general election. Harrelson will play Steve Schmidt, McCain’s senior campaign strategist and adviser.

Based on the bestselling book Game Change, by John Heilemann and Mark Halperin, the film is directed by Roach and written by Danny Strong, whose previous collaboration was HBO’s Recount, about the 2000 Florida recount. Playtone is producing in association with Roach’s Everyman Pictures, with Hanks, Goetzman and Roach executive producing. Strong serves as co-executive producer.