Princess Diana wore a John Galliano Dior dress at the MET gala in 1996 and in the new Disney+ documentary In Vogue: The 90s, the designer talks about his shock when King Charles former wife removed the corset. Princess Diana wore a John Galliano Dior dress at the MET gala in 1996 and in the new Disney+ documentary In Vogue: The 90s, the designer talks about his shock when King Charles former wife removed the corset.