Josh Brolin prepared for his role as George W. Bush by telephoning hotels and talking to the people simply to hear the accent. He also watched videos of Bush to try and get the style of his walk right.
Christian Bale was initially cast as George W. Bush, and even underwent weeks of prosthetics tests before filming began. However, he withdrew from the production at the last minute, prompting Oliver Stone to immediately look for a replacement. Josh Brolin was subsequently given the role following his notable performances in No Country for Old Men and American Gangster.
This movie was filmed sequentially. Josh Brolin lost a considerable amount of weight to play W. in his youth and had to quickly gain it back to play him middle-aged.
When reciting the names of the fraternity brothers during his hazing at Yale, the second and third surnames of people he names are "Hill" and "Hotchkiss." Both Oliver Stone and James Cromwell attended the Pennsylvania-based boarding school for boys The Hill School, and one of the Hill's rival preparatory schools is indeed Hotchkiss.
Was rushed into production in early 2008 after Oliver Stone's intended project Pinkville (2013) was abruptly canceled in late 2007 only two weeks before filming was to begin.
Filming during the middle of Summer in Louisiana meant that elaborate prosthetic makeup could not be used, due to fears the humidity would melt the actors' faces.
During the scene in which Bush is seen flying a naval jet on board the Aircraft Carrier, the show that broadcasts his incident is a political commentary program titled "Spin-Ball" which received both a Conservative and Liberal prospective. The show is actually a 'spoof' of the two highly rated and well known political commentary programs, The O'Reilly Factor on Fox News (hosted by Bill O'Reilly, known for his 'No Spin Zone" which broadcasts a more conservative viewpoint); and MSNBC's Hardball with Chris Matthews, which demonstrates a more liberal viewpoint. In particular, it is a spoof of Chris Matthews' and Ann Coulter's coverage of the aircraft landing, in which the two commentators focused on Bush's appearance.
Most of the film was shot in practical locations in Shreveport, Louisiana. George and Laura Bush's bedroom and George Tenet's bedroom are different rooms in the same mansion.
Oliver Stone and George W. Bush were both in Yale's class of 1968, though Stone dropped out after one year and went to Vietnam instead of graduating, while Bush graduated with his class.
When W. tells his father about the Yale football game over the phone, he mentions "Hill" and "Dowling." These are Yale football running back Calvin Hill and quarterback Brian Dowling, who were the stars of the undefeated 1968 Yale team. Hill, a fraternity brother of Bush's, went on to a career in professional football and now consults with several NFL teams; he married Janet Hill, who had been Hillary Rodham Clinton's college roommate. Their son, Grant Hill, is an NBA player. Dowling also had a stint in the NFL, albeit a briefer one than Hill's. Dowling is now best known as the inspiration for the "Doonesbury" comic strip character B.D., which cartoonist Garry Trudeau started while he, Dowling, and Bush were all Yale students.
When asked in an interview with Playboy Magazine prior to the 2004 Presidential Elections whether he would consider making a movie about George W. Bush, Oliver Stone responded "It's too soon. You need some historical perspective. We had to wait 20 years to do Nixon. As a dramatist, you have to wait. Right now Bush is in full play. It's not time for a biography."
The White House speechwriter named "Mike" played by Colin Hanks is based on two real speechwriters for George W. Bush, David Frum who wrote the "Axis of Evil" speech, and Michael Gerson who was Bush's chief speechwriter from 2001 to 2006.