Harry Potter producers were obviously under an ‘Obscuro’ spell when they completely overlooked two separate identity mix-ups in the much-anticipated reunion special.

Harry Potter 20th Anniversary: Return to Hogwarts began airing on January 1st, and within hours fans had noticed the glaringly obvious gaffe:

“GUYS HELP ME THATS LITERALLY EMMA ROBERTS NOT EMMA WATSON” one fan tweeted.

Sure enough, the photo on screen showed a tiny Emma Roberts – of American Horror Story and Scream Queens fame – not the actress who played Hermione Granger.

“I knew something didn’t look right lmao!!! How did this happen?” one person asked.

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“They showed this photo and I was like… that doesn’t look like her? Lol,” another said.

Roberts had posted the photo, captioned, “Minnie Mouse ears!” to her Instagram in 2012:

Producers acknowledged the error and worked quickly to replace the pic with one of a young Watson on set.

“Well spotted Harry Potter fans! You brought an editing mistake of a mislabeled photograph to our attention. New version is up now,” they said in a statement to The Wrap.

Unfortunately, it wasn’t the only case of mistaken identity on the reunion special.

Real-life twins Oliver and James Phelps, who played Weasley twins George and Fred respectively, were incorrectly labelled during their on-screen interview.

Oliver posted a screen grab of the mistake to Instagram, making a good-natured joke of it.

“I guess after all those plans over the years somebody decided to get their revenge,” he wrote.

“It was fantastic to be part of the HP reunion. Hope you all enjoyed it.”

It seems as though the world has come full-circle, given the Phelps twins didn’t actually know which brother they would be playing until they began filming.

“We’re talking five minutes before we’re supposed to start, we still had no idea who was Fred and who was George,” Oliver said.

After casting director Janet Hirshenson had a “20-second discussion” with author J.K. Rowling, director Chris Columbus and producer David Heyman, she declared James to be playing Fred, and Oliver to be George.

“Now we always like to think they just… ‘Oh, you didn’t get the memo about the huge meeting we had in Burbank with like 50 people on the call.’,” Oliver said.

“But in hindsight, it was probably either Chris, David, or J.K. Rowling just saying… ‘James is Fred.'”

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