The clue he received in the film was from Bellatrix, who was in a frantic frenzy when she thought her vault was broken into. He is ultimately able to identify the cup as a Horcrux because of his ability to hear the piece of Voldemort's soul contained within them, an ability which is not present in the books.

How did Harry know about the Hufflepuff Cup in the book?

Harry knows from his conversations with Dumbledore that if a Horcrux is in the vault, it must either be the Hufflepuff cup or else an unknown object, so they have no choice but to look for the cup.

Did Bellatrix know there was a Horcrux in her vault?

At some point in time, Lord Voldemort gave Bellatrix Lestrange Hufflepuff's Cup, one of his Horcruxes, to keep safe in her vault, though he didn't tell her its true nature.

How did Harry know a Horcrux was in Hogwarts?

Harry had a vision soon after the Gringotts break-in. He saw the locations of all the Horcruxes. He was vindicated in the eyes of Ron and Hermione when he discovered that Hogwarts was the home of one of the Horcruxes.

Why did they break into Bellatrix's vault?

It was carried out by Harry Potter, Ron Weasley, and Hermione Granger in order to steal one of Lord Voldemort's Horcruxes from the vault belonging to the Lestrange family.

Harry Potter and the Deahtly Hallows part 2 - inside Belatrix's vault (HD)

Why was there a fake sword in Bellatrix's vault?

This replica was placed in the case normally holding the real sword, so that the real one could eventually be given to Harry Potter to assist his search for Voldemort's Horcruxes. The replica made its way in time into Bellatrix Lestrange's vault at Gringotts Wizarding Bank.

Why did Snape replace the sword in Bellatrix's vault?

Snape actually did not give Gryffindor's sword to Bellatrix to keep in the vault. He gave a fake one. He did so for multiple reasons - by giving the fake one he can show that he is on their side while simultaneously stopping the hunt for the sword.

Did Dumbledore realize Harry was a Horcrux?

Dumbledore knew about Horcruxes. He knew how they were formed, what happened after that, etc. He probably got to know Harry was a Horcrux when he saw the Scar on Harry's forehead, but maybe he wasn't sure.

Does Voldemort realize Harry is a Horcrux?

Voldemort wasn't aware of Harry being a pseudo-horcrux because he didn't plan it, and Harry didn't know either until Voldemort “killed” him, but he actually killed the piece of soul kept in him.

Did Sirius know Harry was a Horcrux?

His help at the Ministry of Magic might result in a smoother mission. Thanks for A2A. No. Sirius had no idea that Harry was a Horcrux, and I think that is one of the kindest things that was done.

Was Bellatrix pregnant with Voldemort's child?

In the Cursed Child we find out that Bellatrix and Voldemort had a daughter, which means that Bellatrix would have been pregnant during the books.

Is Delphini A Horcrux?

When Harry found out about Delphi's existence, he postulated on whether or not she was a Horcrux. While she is not, technically-speaking, an actual Horcrux, she somewhat functions as one. While she lives, Voldemort's memory lives on.

Why didn't Harry use Avada Kedavra on Bellatrix?

Harry never used the Killing Curse, Avada Kedavra, due to his moral stance against murder and his personal connection to its victims.

Why is there no Gryffindor Horcrux?

Still, any Horcrux would be far more vulnerable than the Sword of Gryffindor. If the sword were to be imbued with a soul fragment and therefore turned into a Horcrux, it would no longer be indestructible but vulnerable to Fiendfyre and basilisk venom—two substances it would have otherwise absorbed in its natural state.

Did Bellatrix know she had a Horcrux?

Harry Potter and the Deathly Hallows

In this book, Rowling reveals that Bellatrix is the guardian of Helga Hufflepuff's cup (though she is unaware that it is a Horcrux), which Voldemort has entrusted the Lestranges to keep in their Gringotts vault.

Why didn't Voldemort just make more Horcruxes?

The books explain it well, mutilating one's soul is something that debilitates the body and soul of those who create Horcruxs, making too many is dangerous which is why Voldemort didn't make others, which is why over time he becomes less human but more similar to a snake.

Was Neville the chosen one?

The prophecy is mentioned throughout the series, however, it never exclusively mentions that Harry is The Chosen One and suggests Neville was another option. However, one theory explains why, in reality, this wasn't possible.

Why did Draco's mom say Harry was dead?

On confirming Draco's very much alive status, she plainly lied that Harry Potter was "dead". This action of hers was both very crucial and important, not only for Harry's survival but for Voldemort's final defeat as well, thus ensuring Harry was again protected by a mother's love, although indirectly.

Was Dumbledore raising Harry like a pig for slaughter?

In the Harry Potter and the Deathly Hallows book, Severus Snape does accuse Dumbledore of using Harry. Snape tells the old wizard: “You've kept him alive so that he can die at the proper moment. You've been raising him like a pig for slaughter!” Dumbledore does not deny these accusations, which doesn't help his case.

Why is Snape the half-blood prince?

Family. Snape's family background is mostly shown in flashbacks during the course of the last three novels. Snape was born to Eileen Prince, a witch, and Tobias Snape, a Muggle, making him a half-blood (hence the name, "Half-Blood Prince").

When did Hermione realize Harry was a Horcrux?

IT was when Harry and Hermione were on their own without Ron, and were hunting for the Horcruxes, its when Harry used to wake up with terrible headaches in themiddles of the night screaming sometimes. Hermione's research into Horcruxes at that time concluded Harry was Voldermot's Horcrux.

Did Harry survive because he was a Horcrux?

Voldemort being a Horcrux for Harry is unlikely because creating a Horcrux requires splitting one's soul through murder. Harry survived the second Killing Curse because a piece of Voldemort's soul lived inside him, and when Voldemort cast the curse, it only killed the piece of his soul inside Harry.

Why did Griphook betray Harry?

However, despite being rescued by them, Griphook's general mistrust of wizardkind resulted in him betraying Harry Potter, Ron Weasley, and Hermione Granger. He betrayed them because he believed they would not hand him the Sword of Gryffindor, after destroying the Cup and other Horcruxes.

Why didn't Hermione just show Bellatrix's wand?

They know she's an impostor. They've been warned", so obviously the request for the wand was unexpected even to him. It's thus pretty safe to conclude that the real Bellatrix had reported her wand stolen and alerted Gringotts prior to the trio's attempted break in.

Why did Harry give Griphook the sword?

Break-in of Gringotts Wizarding Bank (1998)

Harry knew that without a goblins help the trio had no chance of retrieving the cup. Griphook, impressed by Harry's respectful treatment of the house elf, agreed to help on the grounds that he would be given the real sword as payment.