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Jet, whose real name is Diane Youdale-Gilbert, became one of the most memorable Gladiators on the hit 90s ITV show in 1992.
The popular game show, which was originally broadcasted on ITV from 1992 to 2000, sees contestants battle highly trained athletes called 'gladiators' in gruelling physical challenges.
The gym owner, 35, shared the jaw-dropping transformation on Monday through an Instagram Q&A session with her 113,000 followers.
More than three decades since the show first launched, Gladiators returned to screens with a brand new group of superhuman-like athletes challenging members of the public to take them on.
The owner of Morsia fitness app, 38, revealed he struggled with an eating disorder and would often starve himself for two weeks.