THE actress stepped out this week in the same strapless tulle dress she wore to get wed in the summer.
The A-list star chose a strapless, knee-length, off-white dress with a tulle skirt to marry her musician boyfriend James Righton in the south of France over the summer.
And she dusted it off again on Tuesday night to attend a charity red carpet event on Tuesday night - at the SeriousFun Gala at the London Roundhouse, a charity serving children with serious illnesses and their families that was set up by Paul Newman in 1988.
But the dress had been in her wardrobe for five years and is believed to be the same Rodarte frock she wore to a pre-BAFTA party in 2008.
She customised the dress this week with a sheer top overlay with a beaded trim on the collar and cuffs.
For her wedding Keira wore her hair down, with a garland of flowers draped over her head instead of a veil. She completed her bridal outfit with a pair of ballet pumps and a short jacket by Chanel.
The ceremony took place in Mazan, near Avignon, and was attended by only a handful of family and friends.
Knightley began dating her husband, the keyboardist in indie rock band Klaxons, after being introduced by mutual friend, television presenter Alexa Chung. They got engaged last summer.