In the book: Harry, Ron, and Hermione first see a replica of Rowena Ravenclaw’s diadem in the house of that lover of the strange, but ultimate betrayer, Xenophilius Lovegood.
In the movie: If the Horcrux facsimile is there, they make no mention of it. —Keith Staskiewicz
In the book: On the ”Flight of the Seven Harrys,” when our hero’s friends drink Polyjuice Potion and act as decoys, the Death Eaters recognize the real Harry because he uses Expelliarmus — his signature spell.
In the movie: Hedwig returns to try to protect Harry, signaling the real one from the others.—KS
In the book: When Harry, Ron, and Hermione are out camping, they are listening to Potterwatch, the pirate radio show hosted by former classmate Lee Jordan.
In the movie: It’s not a specific show, but rather a series of bulletins. —KS
In the book: Harry’s Gryffindor housemate and former boyfriend of Ginny Weasley, Dean was on the run from the Snatchers during the first half of Deathly Hallows with some companions. He was eventually captured and brought to Malfoy Manor, where he took part in the Dobby-assisted escape with Harry, Ron, and Hermione.
In the movie: The escape takes place… but Dean is nowhere in sight. (Don’t worry, Dean fans: Alfie Enoch, the actor who played Dean Thomas in all the preceding films, will be in Part 2). —Darren Franich
In the book: Desperate to keep Harry safe at Bill and Fleur’s wedding, the Weasley’s snag some hair from a random red-headed Muggle and use Polyjuice potion to turn Harry into one of the many Weasley cousins.
In the movie: Harry roams around the wedding as himself and has to make a break for it with Hermione and Ron. —Adam B. Vary
In the book: One-time Hermione sweetheart Viktor Krum shows up at the wedding as a guest of fellow Tri-Wizard Tournament champion Fleur Delacour. While there, he points out to Harry (still in disguise) the odd shaped triangle-like symbol hanging from Xenophilius Lovegood’s neck, noting angrily that it’s the symbol adopted by notorious dark wizard Gellert Grindelwald.
In the movie: Alas, he didn’t get an invite to the onscreen wedding. —ABV
In the book: Peter Pettigrew’s demise was wonderfully brilliant: After demonstrating his first bit of goodness and integrity by remembering his life debt to Harry and hesitating to kill him, Pettigrew was strangled to death by his own Voldemort-designed silver right hand.
In the movie: This scene was left out of Part 1. We’ll see if Pettigrew survives on the big screen in Part 2. —KS
In the book: During his stay at 12 Grimmauld Place, Harry finds a letter — a fragment, with the bottom portion torn off — written by his mother to Sirius Black (pictured). The contents of the letter aren’t incredibly important, plotwise, which might explain why it doesn’t appear in the movie. But the exact identity of who tore the letter is revealed in the book’s latter half, and it makes for a quietly heartbreaking scene.
In the movie: The letter doesn’t appear at all.—DF
In the book: Greyback is said to be ”the most savage werewolf” in the world by Remus Lupin (a man who definitely knows his werewolves). Greyback is a frightening presence, eventually rising to become one of the leaders of the Snatchers.
In the movie: Greyback is mostly a freaky background figure, and Scabior (Nick Mora), a minor Snatcher in the books, appears to be the head Snatcher. —DF