Screenwriter Simon Barrett's original script was much more serious revenge story which involved soldier returning from war and suffering from PTSD, and him doing complicated revenge plan against some family. This script was actually never finished because Barrett gave up from it. But when director Adam Wingard came up with idea for what eventually turned out to be The Guest, Barrett used some parts of this old script for the movie.
The day Dan Stevens was cast, he was assigned personal trainers and dietitians to begin his physical transformation for the role. He worked out daily for 2 hours a day, even during shooting eventually putting on 25 pounds of muscle and building six pack abs for his shirtless scene.
In the beginning of the movie, when Mrs. Peterson invites David into the house, the first thing she asks him is, "So, are you sure I can't get you anything?" when the only thing she had previously asked him was "Would you like to come inside?"
Major Carver tells Anna that David has killed both her parents. However there is no evidence he discovered Laura's body where David left it after stabbing her to death.
Avarice - Performed by Throwing Snow: Music from official teaser trailer.Mavericks - Performed by Johnossi: Music from official theatrical trailer.Let's Fight - Performed by Two Fingers: Music from UK trailer for the movie.The Magician - Performed by Mike Simonetti: Luke enters the bar/David orders the drinks.Hourglass - Performed by S U R V I V E: David and Luke get their drinks.Emma - Performed by The Sisters of Mercy: David and Anna bump into each other outside the bathroom.Obsidian - Performed by Gatekeeper: David and Anna arrive at the party.SaharA - Performed by F.O.O.L: David brings the kegs of beer/David smokes joint and gives it to Anna.Moldavia - Performed by Front 242: David knocks out Kristen's ex-boyfriend.I Want To Go To Hell - Performed by Hocico: David has sex with Kristen.Der Mussolini (1998 Remaster) - Performed by DAF: David talks with Craig and asks him can he get him a gun.Sacrifice - Performed by Front 242: Anna asks David is he ready to go home after party.Masquerade - Performed by Clan of Xymox: David and Anna drive home from the Halloween party.Haunted When the Minutes Drag - Performed by Love and Rockets: Anna falls asleep in her room while David stares out the window in his.Storm Column - Performed by Gatekeeper: Anna gets the call from military base after she called for informations about David.Omniverse - Performed by S U R V I V E: Anna takes David's "burner" phone and takes a picture of numbers which he called/Anna gets the call from Zeke and he tells her that he is in jail.Because I Love You (The Postman Song) - Performed by Stevie B: David arrives at the diner, kills Kristen and blows the diner up.A Day - Performed by Clan Of Xymox: Major Carver, Anna and Luke are trying to get out of the school/David kills Luke's supervising teacher/David cuts Major Carver.Vengeance - Performed by Perturbator: David tells Major Carver that he shouldn't follow him/David hears Anna's scream.Alles Ist Gut (1998 Remaster) - Performed by DAF: David is searching for Anna and realizes that she took Carver's gun.Anthonio (Berlin Breakdown Version) - Performed by Annie: Final fight between David, Anna and Luke.Cry In the Wind - Performed by Clan of Xymox: The end credits.