Now, the British actress has recycled the haute couture dress a second time, wearing the dress to the SeriousFun Children's Network charity gala in London on Tuesday.
Knightley paired the strapless dress with silver sandals and wore a sheer long-sleeved shirt with an embroidered neckline and cuffs underneath, giving the dress a different twist from its previous appearances.
In February 2008, Knightley wore the dress to the Finch & Partners' pre-BAFTA event with black tights and pumps. When she wed Klaxons musician James Righton in May, she added a white Chanel jacket and ballet flats.
Keira Knightley looking fabulous last night xx pic.twitter.com/vzUMRkoCy1— Lady Sarcasticus (@YES_IM_RUDE) December 4, 2013
2014: The Year in Music [PHOTOS]