Katie, 36, is famed for wearing feminine and often wacky outfits (pantomime horse, anyone? Or giant lips?) but has slicked her hair back and opted for an androgynous style in the name of raising cash.
Former glamour model Katie, who won Celebrity Big Brother earlier this month, seriously turned heads as she commanded the catwalk in a black suit, teamed with white blouse and black bow-tie.
The mum-of-five completed her look with a pair of black heels, a super-sleek up 'do and she added a pop of colour to her monochrome outfit with a splash of red lipstick. Wow!
Katie was walking the runway for Fashion For Relief, a charity set up by supermodel Naomi Campbell in 2005. Originally, the organisation raised money for victims of Hurricane Katrina and now it donates to wide range of charities.
It was definitely a celeb-studded night, as Katie was joined at the event by inspirational star Katie Piper, Strictly Come Dancing finalist Mark Wright and his fiancée Michelle Keegan.
Earlier in the day, Katie was pictured at rehearsals for the show and she was joined on stage by her son Junior and Katie Piper as they walked through their routines.
Junior obviously stuck around to watch his mum in action, as the pair were later spotted leaving London's exclusive Somerset House, where the fashion show was held.
Good work, Kate!
Katie Price's most wackiest costumes: