But Katie managed to land an invite to the affair after moving to the Beckhams' stomping ground earlier this year with husband Peter Andre and her three children in tow.
Their feud dates back to 2000, when Katie claimed that Victoria had ruined her relationship with singer Dane Bowers.
Posh is said to have retaliated by calling Katie 'vile', but has since maintained a dignified silence on the matter.
Never one to keep quiet, Katie, 30, has continued to take swipes at the 34-year-old in the intervening years.
She has, among other things, described herself as better looking than Victoria, adding: 'It’s not hard to be better looking than her, is it? She’s just a footballer's wife.'
Both wore black gowns with long trains to last night's event, but Posh was determined not to be upstaged.
She spent a great deal of time on the red carpet, with a source revealing she ruffled some feathers as guests were forced to wait to make their way through the only entrance.
New social circle: Posh mingled with Eva Longoria and Dita Von Teese
Queen bee: Posh held court with Kate Beckinsale and Longoria
An insider said Victoria was politely asked if she would move aside for a moment to let people past, but she is said to have responded: 'Let them wait.'
Once she eventually made her way in, it seemed Posh decided her best revenge against Katie was to completely dismiss the former Page 3 girl.
She instead spent the evening mingling with her powerful new friends including Desperate Housewives actress Eva Longoria and burlesque star Dita Von Teese.
She also caught up with her other Hollywood best friend Kate Beckinsale, who appears to have taken a lesson in posing from the master, Mrs Beckham.
