15 Actors You Completely Forgot Were In The Harry Potter Series

Everyone is familiar with the "Harry Potter," trio of Daniel Radcliffe, Rupert Grint, and Emma Watson.
What about the numerous other witches, wizards, and muggles who appeared on the series' screen? The performances of these young actors (who are just starting their careers) probably caught your attention as you watched Harry and his pals battle dragons and search for Horcruxes. However, you might have completely forgotten all about them.
Throughout eight full-length Harry Potter films, it almost became a requirement for British actors to appear in at least one of those high-profile fantasy pictures, even if only for a brief appearance.
Stars like Robert Pattinson and Scarlett Byrne, who were just breaking into the acting business at the time, are among the performers you probably forgot appeared in the Harry Potter films. However, other actors, such as Kenneth Branagh and John Cleese, were already famous on the big screen at the time.
Here are 15 renowned actors and actresses who you might have forgotten played a role in the Harry Potter Series.

#1 Jamie Campbell Bower as Gellert Grindelwald

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Bower has undoubtedly starred in a sizable number of book-to-film series. He also played a youthful Gellert Grindelwald in Harry Potter and the Deathly Hallows: Part 1, in addition to his parts in The Mortal Instruments: City of Bones and the Twilight movies.

#2 Derek Hough as a Hogwarts student

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The DWTS judge appeared briefly as a Ravenclaw in the first Harry Potter movie, just like his sister did.
"Hermione is shown carrying her suitcase at a specific moment as she departs for Christmas. As we move down the corridor, "He spoke about his scene with Entertainment Weekly. "I had an owl in my hands. My major moment is that. You can clearly see me every time you look at Hermione because I'm directly in the camera's field of view."
Hough said he not only substituted for Tom Felton but also made a brief appearance in the film (Draco Malfoy). He said, "That was my claim to fame!"

#3 Regé-Jean Page as a wedding guest

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Page has acted in several book-to-film adaptations than Bridgerton. Page made an appearance in Harry Potter and the Deathly Hallows: Part 1 before landing the role of the Duke of Hastings. The actor attended Bill and Fleur's wedding in an uncredited cameo as a guest.

#4 Michelle Fairley as Mrs. Granger

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Before her role as Catelyn Stark on Game of Thrones, Fairley had a minor part as Hermione Granger's mother.
In Harry Potter and the Chamber of Secrets, Heather Bleasdale originally played the part; however, in Harry Potter and the Deathly Hallows, Fairley took over.

#5 Julianne Hough as a Hogwarts student

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Hough had a supporting part as a Gryffindor student in Harry Potter and the Sorcerer's Stone long before she became a Dancing With the Stars contestant. You may see her cheering during one of the Quidditch games if you look attentively.
Daniel Radcliffe, the star of the movie, was Hough's huge crush while it was being filmed. She remembered to PEOPLE, "I gave him a love card and a Beanie Baby for Valentine's Day. Since I was only an extra, I didn't give it to him directly, but I did give it to his PA or assistant who was working with him.

#6 Hero Fiennes Tiffin as a young Tom Riddle

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One of Fiennes Tiffin's earliest jobs was that of a young Tom Riddle (also known as a young Voldemort) in Harry Potter and the Half-Blood Prince before he played Hardin Scott in the After movies.
Given that Ralph Fiennes, who notably played Voldermort throughout the franchise, is his uncle, the part was pretty much made for him.

#7 Kenneth Branagh as Gilderoy Lockhart

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Branagh has a vast list of acting roles under his belt, including those of Hercule Poirot in the upcoming Death on the Nile and the 2017 film Murder on the Orient Express. He also had a minor part in Harry Potter and the Chamber of Secrets. The actor took on the role of Gilderoy Lockhart, a well-known novelist who was hired by Hogwarts to teach Defense Against the Dark Arts.

#8 Freddie Stroma as Cormac McLaggen

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Before his roles on Bridgerton, Time After Time, and Unreal on Lifetime, Stroma had a regular part in the Harry Potter movies. He portrayed Cormac McLaggen, a haughty Gryffindor student with his eyes on Hermione, in the final three films of the series.

#9 John Cleese as Nearly Headless Nick

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The actor, who is most recognized for his roles in the Monty Python movies, portrayed Nearly Headless Nick, a ghost from Hogwarts, in the Harry Potter movies.

#10 Rhys Ifans as Xenophilius Lovegood

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In his portrayal of Luna Lovegood's father, Ifans is hardly recognizable. In Harry Potter and the Deathly Hallows: Part 1, the actor, who most recently returned to the role of Dr. Curt Connors in Spider-Man: No Way Home, as the eccentric Xenophilius Lovegood.

#11 Bill Nighy as Rufus Scrimgeour

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Nighy has a minor appearance in Harry Potter and the Deathly Hallows - Part 1 in addition to his renowned performances in Love Actually, the Pirates of the Caribbean film trilogy, and About Time. He portrayed Rufus Scrimgeour, who succeeded Cornelius Fudge as the Minister for Magic.

#12 Jim Broadbent as Horace Slughorn

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In both Harry Potter and the Half-Blood Prince and Harry Potter and the Deathly Hallows - Part 2, the Bridget Jones's Diary actor portrayed Horace Slughorn. His persona informs a young Tom Riddle about Horcruxes, which leads to a host of complications later on in the narrative.

#13 Robert Pattinson as Cedric Diggory

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Before being cast as Edward in Twilight, Pattinson made a major impression in 2005's Harry Potter and the Goblet of Fire as heartthrob Cedric Diggory.

#14 David Tennant as Bartemius Crouch Junior

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In 2005's Harry Potter and the Goblet of Fire, Tennant played Bartemius Crouch Junior, a Death Eater, about the same time he appeared on Doctor Who. To manipulate the Triwizard Tournament so that Harry Potter triumphs, Voldemort assumes the identity of Alastor "Mad-Eye" Moody in the movie.

#15 Domhnall Gleeson as Bill Weasley

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One of Gleeson's first significant jobs was as the eldest Weasley child, even though he has since been in other noteworthy movies, such as About Time, Anna Karenina, and the Star Wars sequel trilogy. Both Harry Potter and the Deathly Hallows: Part 1 and Harry Potter and the Deathly Hallows: Part 2 had Gleeson as the character.