The mysterious R.A.B., who turns out to be Sirius Black's brother Regulus, plays a small but pivotal role in the Harry Potter franchise.

Crookshanks Is Regulus Black Due to the existence of animagi in the world of Harry Potter, any animal character and their potential human secret identity is bound to be discussed at length on fan ...

With HBO Max finalising the new actors for Harry, Ron and Hermione in its upcoming Harry Potter TV series, we couldn’t help but reflect on all the characters who, in our view, weren’t properly ...

Theory: R.A.B., who signed the letter Harry found instead of a Horcrux in Voldemort’s cave, is Sirius Black’s brother Regulus.

Harry Potter and the Half-Blood Prince continues production in England, with a release date of November 21, 2008. Thanks so much to Potterish !

R.A.B. in Harry Potter was more than a character, but even still, Regulus Black was one of the most important characters in the entire story.

Regulus Black, Explained Throughout the "Harry Potter" books and movies — the original ones, not the "Fantastic Beasts" franchise — there are plenty of mysteries scattered around for both the audience ...