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Editor’s note: On Wednesday, Sept. 11 the Edmonton Expo announced Matthew Lewis will no longer appear at the event due to professional commitments. The expo said it was working to find another Harry Potter cast member to come instead, but given the short timeline it might not be possible.

Previous coverage:

The actor who played one of the most transformative characters in the epic Harry Potter saga is coming to Edmonton this fall for the eighth annual Edmonton Comic & Entertainment Expo.

Matthew Lewis starred in the magical film franchise as Neville Longbottom, a Gryffindor who grew from a self-conscious, bumbling student into a brave, major player in the climactic final battle of the seven-book, eight-movie series.

READ MORE: ‘Harry Potter’ anniversary — 20 Potter-y things we’re thankful for

Actor Matthew Lewis as Neville in promotional photos for 'Harry Potter.' . Supplied by the Edmonton Comic & Entertainment Expo Actor Matthew Lewis as Neville in promotional photos for 'Harry Potter.' . Supplied by the Edmonton Comic & Entertainment Expo Actor Matthew Lewis as Neville in promotional photos for 'Harry Potter.' . Supplied by the Edmonton Comic & Entertainment Expo Actor Matthew Lewis. Supplied by the Edmonton Comic & Entertainment Expo

The actor himself underwent a similar change from an awkward kid to an attractive young man whose transformation inspired the term “Neville Longbottoming.”

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Matthew Lewis appears on the cover of the June 2015 issue of ‘Attitude.’. Attitude

In addition to Harry Potter, Lewis has also appeared in films such as Me Before You (starring Game of Thrones‘ Emilia Clarke and The Hunger Games‘ Sam Claflin) and the BBC’s The Syndicate TV series.

Lewis will appear as a special guest at the Edmonton Expo on Saturday, Sept. 21 and Sunday, Sept. 22. He will participate in fan meet-and-greet and autograph signing sessions as well as a spotlight panel. The full schedule of the event is set to be released in September.

The Expo said this will be the British actor’s first convention in Western Canada.

READ MORE: Mayor Iveson joins the fun, discusses future of the city at Edmonton Expo

Other actors appearing at the Expo include George Takei (Star Trek), Joonas Suotamo (who took over the role of Chewbacca in Star Wars from Peter Mayhew), Cary Elwes (Stranger Things, The Princess Bride, Robin Hood: Men in Tights), Christopher Eccleston (Doctor Who, Thor: The Dark World, Gone in 60 Seconds) and Sean Maguire (Once Upon a Time, EastEnders).

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In this June 7, 2015 file photo, actor George Takei arrives at the 69th annual Tony Awards in New York. Evan Agostini/Invision/AP, File In a photo from 'Solo: A Star Wars Story,' (L-R) Alden Ehrenreich as Han Solo and Joonas Suotamo as Chewbacca. Jonathan Olley / Lucasfilm / Walt Disney Studios Motion Pictures / Courtesy Everett Collection Cary Elwes, pictured in July 2013. Getty Images Actor Sean Maguire (L) and actress Lana Parrilla attend the "Once Upon a Time" panel during Comic-Con International 2015 at the San Diego Convention Center on July 11, 2015 in San Diego, California. Ethan Miller/Getty Images Christopher Eccleston attends the World Premiere of "Thor: The Dark World" at Odeon Leicester Square on October 22, 2013 in London, England. Mike Marsland/WireImage

The Edmonton Comic & Entertainment Expo runs from Sept. 20 to 22 at the Edmonton Expo Centre.

Previous notable guests have included the late comic book legend Stan Lee, Star Wars actress Carrie Fisher, Doctor Who‘s Matt Smith and David Tennant, Lord of the Rings’ John Rhys Davies and Billy Boyd, Back to the Future‘s Christopher Lloyd and Mr. Robot‘s Christian Slater.

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READ MORE: David Tennant to make first appearance at Edmonton Comic and Entertainment Expo

WATCH: Interviews with past Edmonton Expo celebrity guests