Did Sirius Acknowledge Regulus Black Harry Potter Before The War?

The 'Harry Potter' series leaves a lot of room for speculation when it comes to minor character dynamics, and James Potter and Regulus Black’s interactions are one of those intriguing gaps. From what’s shown in the books, they likely crossed paths at Hogwarts since they were contemporaries—James in Gryffindor and Regulus in Slytherin. The Marauders’ rivalry with the Slytherins, especially Snape, suggests there might’ve been tension, but J.K. Rowling never explicitly writes a scene between them. Regulus turned against Voldemort later, which adds a fascinating layer—what if he and James had a moment of understanding before Regulus’ death? It’s fun to imagine, but canon stays silent. Personally, I love fanfics that explore this 'what if,' blending James’ arrogance with Regulus’ quiet defiance. The lack of concrete info makes it a perfect sandbox for headcanons.

I fell down a Regulus spiral the first time I read about him in 'Harry Potter and the Deathly Hallows'—there's something quietly heroic and tragic about his whole arc. Regulus Arcturus Black was the younger brother in the Black family, born into that old, proud pure-blood tradition that valued blood status above everything. He went to Hogwarts and was sorted into Slytherin, and at some point in his youth he joined the Death Eaters, convinced by family loyalty and the heady power of belonging to Voldemort's inner circle. The turning point, canonically, is when Regulus discovered that Voldemort had made a Horcrux out of Slytherin's locket. Horrified at what Voldemort had become and how he was being used, Regulus used Kreacher—the house-elf he treated badly and later showed a surprising streak of compassion toward—to help him stealthily retrieve the locket from the cave where Voldemort hid it. He forced Kreacher to help him because Kreacher could obey orders Voldemort's protections would ignore. Regulus drank the basin potion that protected the Horcrux and was weakened; he ordered Kreacher to take the locket back to their family home. Before Kreacher fled, Regulus managed to swap the real locket with a fake and scrawled the initials 'R.A.B.' in it, intending for someone to know what he had done. Sadly, Regulus never made it out alive. The cave was defended by Inferi, and when Regulus commanded Kreacher to go, he was left behind and died there, probably pulled under by the Inferi. His bravery only came to light years later through Kreacher's memories and the discoveries in 'Harry Potter and the Half-Blood Prince' and 'Deathly Hallows', which set Harry and co. on the path to finding the Horcruxes. To me, Regulus is one of the quietest redemption stories in the series: he started on the wrong side, but when it mattered he acted—and paid the ultimate price. It always leaves me a little bittersweet when I think about him in Grimmauld Place, and how small acts of conscience can ripple into something huge.

Man, this question takes me back to those late-night debates in online forums! From what I remember in 'Harry Potter and the Order of the Phoenix,' Sirius definitely had suspicions about Snape. The way they interacted at Grimmauld Place was pure venom—Sirius didn’t trust him an inch. But did he know Snape was a Death Eater? It’s murky. Sirius was in Azkaban during Snape’s double-agent days, and Dumbledore kept that info tight. Sirius might’ve guessed based on Snape’s past, but I doubt he had concrete proof. That whole 'Snape’s just lurking for Voldemort’s return' vibe from Sirius feels more like bitter intuition than facts. Honestly, their feud was so personal that it clouded everything. Sirius saw Snape as the greasy git who bullied his best friend, not just a potential Death Eater. The books never flat-out say Sirius knew, but his distrust was loud enough to fill the silence. Plus, Dumbledore’s secrecy didn’t help—Sirius wasn’t in the inner circle for those revelations. It’s one of those things where fandom headcanons run wild because the canon leaves room for interpretation.

Regulus Black is one of those fascinating background characters in the 'Harry Potter' universe who never appears directly in the films, but his legacy looms large. I first learned about him through the books, especially 'Harry Potter and the Half-Blood Prince,' where his role as Sirius Black's younger brother and a former Death Eater who turned against Voldemort is revealed. The films, though, never show him on screen—just mentions in dialogue, like when Kreacher talks about him. It's a shame because his story is so compelling: a Slytherin who secretly sabotaged Voldemort's Horcrux and died for it. The movies missed a chance to dive deeper into the Black family drama, which could've added even more emotional weight to Sirius's arc. Still, I love how the fandom has embraced Regulus. Fan art and fanfiction explore his conflicted morality, and some even imagine what he might’ve looked like (usually as a younger, paler version of Sirius). If they ever expand the 'Harry Potter' film universe with a Black family prequel, he’d be a perfect tragic hero. Until then, we’ll have to settle for the books and our imaginations.

This is one of those tiny fandom mysteries that I end up chewing on during late-night rereads. Short take: there aren’t any officially published deleted chapters from the seven main 'Harry Potter' books that focus solely on Regulus Black as a standalone scene. What we get in the canon is mostly woven into existing chapters — the biggest reveal about Regulus and the locket comes through Kreacher’s memories in 'Deathly Hallows' (the chapter often called 'Kreacher’s Tale'), and that’s the canonical moment where his sacrifice is fully explained. That said, J.K. Rowling expanded Regulus’s background outside the novels. She wrote extra pieces on the website that used to be Pottermore (now WizardingWorld), giving short biographies and bits of context about side characters like Regulus Arcturus Black. Many fans treat those posts and Rowling’s subsequent interviews and tweets as part of the wider canon, since they’re the author’s own supplemental notes. So if you’re chasing more Regulus content, check out those Pottermore/WizardingWorld entries and a few of Rowling’s Q&A remarks — they flesh him out more than the book text alone. Finally, be aware of fanfiction and rumor: there are plenty of imagined deleted chapters floating around forums and AO3 where writers create entire scenes of Regulus sneaking into Grimmauld Place or writing the famous note. Those are fun, but they’re not official. If you want the official feel, read Kreacher’s memories in 'Deathly Hallows' and the Pottermore piece; they’re short but they hit hard, emotionally.