RED-FACTED 'Harry Potter' producers have admitted they accidentally used a photo of actress Emma Roberts during the 20th anniversary special. Eagle-eyed fans pointed out the photo cock-up - a childhood photo of American Emma in Mickey Mouse ears was used in place of series star Emma Watson. The mistake appeared in the 'Harry Potter 20th Anniversary: Return to Hogwarts' special where the show's cast returned to discuss the legendary film series. Potter executives have promised to rectify their mistake and a new version of the show will soon be available. They said:" Well spotted Harry Potter fans! You brought an editing mistake of a mislabelled photograph to our attention. New version up shortly."