The ex-TOWIE star reveals in tomorrow night's episode of Safeword that she read for the part of Ron Weasley's girlfriend in the film franchise but wasn't successful.
"I auditioned for a part in Harry Potter to play Ron Weasley's girlfriend, and obviously didn't get that part either because I would have been in the Harry Potter films," she said.
Ferne didn't give the name of the character she auditioned to play but we're guessing it was probably Lavender Brown? She was in the same year as Harry, Ron and Hermione and dated Ron during the events of Harry Potter and the Half Blood Prince.
The role was played on screen by actress Jessie Cave.
Harry Potter wasn't the only thing Ferne auditioned for as a youngster: she also tried out for S Club Juniors! The eventual members of that band included The Saturdays' Rochelle Humes and Frankie Bridge.
During the episode we'll also see the Safeword team hijacking Ferne's Twitter account to promote a new range of jungle-themed adult toys!
But Ferne is quite hesitant at allowing a tweet poking fun at former TOWIE co-star Gemma Collins to be published. The team want to write that the sex toys come in three sizes: small, medium and Gemma Collins.
Ferne's also unsure about a second tweet involving her I'm A Celebrity... Get Me Out Of Here! co-star George Shelley. "George is a good friend of mine and I just don't know if I feel comfortable tweeting this".
Ferne appears on Safeword alongside James Haskell,
Safeword – Thursday 23rd June, 10pm on ITV2