'Harry Potter' reunion producers admit to using photo of Emma Roberts instead of Emma Watson

'Harry Potter 20th Anniversary: Return to Hogwarts' special used photo of Roberts when it meant to use Watson

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Some "Harry Potter" fans are a bit perplexed after spotting a mistake involving Emma Watson and Emma Roberts that appeared in the "Harry Potter 20th Anniversary: Return to Hogwarts" special. 

On New Year's Day, HBO Max debuted the retrospective, which reunited key cast members from the movie franchise, such as Daniel Radcliffe, Rupert Grint and Emma Watson. Watson, as fans know, played Hermione Granger in all eight of the franchise’s films. However, one eagle-eyed fan noticed a moment in the special that saw the 31-year-old replaced with another Emma — "American Horror Story" actress Emma Roberts. 

Producers confirmed to Fox News that there was a small mistake in the editing of the "Harry Potter" special in a segment in which pictures of the cast before they were made famous by the first film in 2001 were shown. Instead of using a photo of Watson as a child, they admitted to accidentally using an image of Roberts wearing Minnie Mouse ears while eating breakfast. 

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A photo of Emma Roberts was used instead of a photo of Emma Watson during HBO Max's "Harry Potter" reunion special.

A photo of Emma Roberts was used instead of a photo of Emma Watson during HBO Max's "Harry Potter" reunion special. (Karwai Tang/WireImage/Amy Sussman/Getty Images)

"Well spotted Harry Potter fans! You brought an editing mistake of a mislabeled photograph to our attention. New version is up now," read a statement from the producers provided to Fox News.

The gaffe went viral thanks to one eagle-eyed fan who spotted the photo and recognized it as one that Roberts, 30, shared on her Instagram in 2012

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"GUYS HELP ME THATS LITERALLY EMMA ROBERTS NOT EMMA WATSON," the user wrote on Twitter along with a screenshot of both the image on the HBO Max special and Roberts' Instagram post. 

Fortunately, besides the photo mistake, there was no shortage of former "Harry Potter" stars who were in attendance to discuss the film, its legacy and what it has been like for them since the eighth and final installment (not including the "Fantastic Beasts" franchise) concluded in 2011. 

Emma Watson reunited with her "Harry Potter" co-stars. 

Emma Watson reunited with her "Harry Potter" co-stars.  (Photo by Paul Bruinooge/Patrick McMullan via Getty Images)

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Helena Bonham Carter, Robbie Coltrane, Ralph Fiennes, Jason Isaacs, Gary Oldman, Tom Felton, James Phelps, Oliver Phelps, Mark Williams, Bonnie Wright, Alfred Enoch, Ian Hart, Toby Jones, Matthew Lewis, Evanna Lynch, producer David Heyman and filmmakers Chris Columbus, Alfonso Cuarón, Mike Newell and David Yates were all on hand to discuss the film franchise, based on the novels by author J.K. Rowling.

Emma Watson, Daniel Radcliffe and Rupert Grint reunited for a "Harry Potter" special at HBO Max.

Emma Watson, Daniel Radcliffe and Rupert Grint reunited for a "Harry Potter" special at HBO Max. (Photo by DMIPhoto/FilmMagic)

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So far neither actress has commented on the mishap.