Margot Robbie’s recent name change has brought renewed attention to her husband, Tom Ackerley, and his little-known appearance in the Harry Potter film franchise.The English filmmaker played an unidentified Slytherin student in Harry Potter and the Prisoner of Azkaban (2004), a role Robbie revealed during an appearance on The Graham Norton Show in January 2020.Nearly 10 years after their marriage, the actress is now listed as Margot Elise Ackerley in official business documents for LuckyChap Entertainment, the production company the couple co-founded in 2014. The change was reported by Page Six on September 25, 2026.While Robbie appears to have adopted her husband's surname in business records, she is expected to continue using her maiden name professionally.More about Margot Robbie's husband Tom Ackerley's role in Harry PotterTom Ackerley, born on January 1, 1990, in Surrey, England, is an English filmmaker. He appeared in the third Harry Potter film, Harry Potter and the Prisoner of Azkaban. According to the Harry Potter Wiki, he portrayed an unidentified Slytherin student in the 2004 film adaptation.Ackerley's appearance in the film was brought to light by Margot Robbie during her January 31, 2020, appearance on The Graham Norton Show. The revelation connected the filmmaker to the popular fantasy franchise, although his role was a minor one.Robert Pattinson Oscar Campaign @_Potter_Head_7_LINKNever forget that Margot’s husband & co-producer, Tom was an extra in Harry PotterAckerley later established a career in film production, working alongside Robbie on several projects through their production company, LuckyChap Entertainment. The couple co-founded the company in 2014 with their friends, according to Page Six's report.LuckyChap has been involved in films including I, Tonya, Birds of Prey, Barbie and Saltburn. Tom Ackerley and Margot Robbie have also worked together on television projects, including the Amazon Prime Video drama Sterling Point, which premiered on August 5, 2026, according to PEOPLE on September 25, 2026.The filmmaker has spoken about the overlap between his professional and personal life with Robbie. In remarks cited by Page Six, Ackerley said the couple did not consciously separate their work from their relationship, describing the arrangement as seamless.Margot Robbie changes her surname in official business documentsMargot Robbie has adopted her husband's surname in official business records, with new filings for LuckyChap Entertainment listing her as Margot Elise Ackerley instead of Margot Elise Robbie.According to PEOPLE's September 25, 2026, report, the name change was confirmed by UK authorities on September 23. Page Six reported that the filing, received on Monday, reflected the change in the actress's name. She had continued using Robbie in company records since being appointed a director in May 2015.The change comes ahead of the couple's 10th wedding anniversary in December. Both Page Six and PEOPLE reported that Robbie is expected to retain her professional name. PEOPLE noted that she was credited as Margot Robbie in Sterling Point, the coming-of-age drama she co-produced through LuckyChap.The actress and Tom Ackerley married in a private ceremony in Byron Bay, Australia, in December 2016, after beginning their relationship in 2014. They first met in 2013 while working on the World War II drama Suite Française, in which Robbie starred, and Ackerley worked as an assistant director.The couple later became friends and roommates before their relationship turned romantic. Margot Robbie discussed their relationship in a 2016 interview with Vogue, saying she had not expected to fall in love with him. In a separate interview with Porter in 2018, she described married life as enjoyable and said they made time for each other despite their work schedules.The couple welcomed their first child, a son, on October 17, 2024, according to PEOPLE.