The special, which aired on New Year’s Day, was an emotional affair for Harry Potter fans around the world, as Emma reunited with co-stars including Daniel Radcliffe, Rupert Grint, Tom Felton and Bonnie Wright for the 20th anniversary of the first film in the franchise, The Philosopher’s Stone.
In one segment that focused on Watson’s childhood, an image was shown of a young girl sitting in front of a plate of food at a kitchen table while wearing Minnie Mouse ears.
Eagle-eyed viewers quickly realised that the photo was actually of a young Emma Roberts, best-known for starring in productions including Wild Child, We’re The Millers, Scream Queens and American Horror Story.
After the producers acknowledged the blunder in a statement, the error has since been fixed with a different picture.
The Hermione Granger star has since shared the original photo in a post on Instagram, writing in the caption: ‘I was NOT this cute, @emmaroberts #emmasistersforever,’ alongside a cry-laughing emoji.
Roberts is yet to respond to her childhood photo accidentally making its way into the Harry Potter Reunion, but we have a feeling that she’ll take it in good humour.
In July 2011, Roberts tweeted about going to see the final film in the series, Deathly Hallows Part 2, writing: ‘Saw Harry Potter last night! Was AMAZING! Although I will never get used to 3D glasses #headache #epicmovie.’
Several fans responded to Watson’s Instagram post remarking on how funny the mix-up was.
‘My goodness this was so hilarious,’ one person said, while another commented: ‘Finally confusion cleared.’
The mistakes didn’t stop there in the Harry Potter special, as Oliver Phelps – who played George Weasley in the movies – revealed that he and his twin brother James Phelps – who portrayed Fred Weasley – had been incorrectly labelled.
Sharing a screenshot of the moment on Instagram, he wrote: ‘I guess after all those pranks over the years somebody decided to get their revenge.’
Neville Longbottom actor Matthew Lewis expressed his astonishment over the slip, commenting: ‘This is legit hilarious. Dude. Wtf? Haha.’
Meanwhile, Draco Malfoy actor Tom joked that it was ‘his doing’.
Harry Potter 20th Anniversary: Return to Hogwarts is available to watch on HBO Max, Sky Showcase and NOW.
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