Hough portrayed an uncredited Hogwarts schoolgirl in the film franchise's first installment, and can be spotted in several scenes. "Happy 20th anniversary, Harry Potter! Remember that one time when I was 11 and a Gryffindor?" she captioned the flashback photos. "Oh, and apparently liked flirting with the Weasley twins? #ivealwayslovedredheads #gryffindor #harrypotter #firstfilm"
The 28-year-old triple-threat star isn't the only one to get her big break after having a smaller part in the Harry Potter films. Twilight heartthrob Robert Pattinson portrayed Cedric Diggory in the 2005 sequel, Harry Potter and the Goblet of Fire.
“I was going to go to university instead,” he admitted to ET in 2005, recalling what was going on in his life at the time he was cast in the movie. “I hadn't decided and I was kind of messing up my school stuff and they said, 'Hey do you want to work on this for a year?' I was like, 'Yeah, OK.'”
Check out more of ET's interview with Pattinson before Twilight put him on the map: