Feminine, eclectic and elegant: put simply, she looks every inch the icon she is.
Here's a look back at some of her best looks.
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1
Keira Knightley in Simone Rocha
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The 34-year-old actress made her first red carpet appearance since welcoming her second child at the London Film Festival for the premiere of her new film Official Secrets. For the event, she wore a beautiful Simone Rocha sheer midi dress with puff sleeves.
While the actress and musician husband James Righton have not publicly announced the birth of their second child, the Imitation Game actress was seen in May displaying her baby bump in Paris.
The couple are already parents to four-year-old Edie
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2
Keira Knightley in Chanel
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The actress attended the Chanel Cruise Collection 2020 at the Grand Palais in May 2019.
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3
Keira Knightley in Chanel
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The actress debuted her baby bump at a cocktail party for CHANEL J12 in Paris in May 2019.
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4
Keira Knightley in Valentino
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Knightley wore a lime green tulle Valentino dress for the New York City screening of her film The Aftermath in March 2019.
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5
Keira Knightley in The Vampire's Wife
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To attend a BAFTA event in her honour, the actress stunned in a floral print dress by The Vampire's Wife.
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6
Keira Knightley in Chanel
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The actress wore a classic Chanel tweed skirt suit and matching hat to collect her OBE for services to drama and charity at Buckingham Palace in December 2018.
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7
Keira Knightley in Chanel Couture
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The actress stunned at the premiere of Disney's The Nutcracker in November 2018 when she wore an off-the-shoulder dress from Chanel Couture that could have been straight out of the fairytale itself.
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8
Keira Knightley in Orla Kiely
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Knightley out and about in an Orla Kiely dress in LA, February 2015.
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9
Keira Knightley
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Knightley wears MICHAEL VAN DER HAM to The Imitation Game film private reception in London, February 2015.
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10
Keira Knightley in Chanel
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Keira Knightley attends the 72nd annual Golden Globe Awards, wearing a custom Pre-Fall 2015 Chanel dress, January 2015.
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11
Keira Knightley in Holly Fulton
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Keira Knightley wears a Holly Fulton spring/summer 2015 dress as she attends BAFTA New York Presents: In Conversation With Keira Knightley, November 2014.
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12
Keira Knightley in Dolce & Gabbana
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Keira Knightley wears a Dolce & Gabbana s/s 2015 dress to the New York premiere of The Imitation Game, November 2014.
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13
Keira Knightley in Nina Ricci
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Keria Knightley at the Academy Of Motion Picture Arts And Sciences' Governors Awards in Hollywood, November wearing Nina Ricci, November 2014.
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14
Keira Knightley in Valentino
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Keira Knightley wears Valentino Couture to the opening night gala screening of The Imitation Game during the 58th BFI London Film Festival in London, October 2014.
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15
Keira Knightley in Valentino
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Keria Knightley wears Valentino to a photocall for The Imitation Game during the 58th BFI London Film Festival in London, October 2014.
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16
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Keira Knightley attends the 'Laggies' premiere during the 2014 Toronto International Film Festival at Roy Thomson Hall on September 10, 2014 in Toronto, Canada.
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17
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Keira Knightley at 'The Imitation Game' film premiere, Toronto International Film Festival, Canada.
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18
Keira Knightley in Simone Rocha
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Keira Knightley wears Simone Rocha a/w 2014 nude sheer sleeveless dress to a photocall Begin Again in London.
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19
Keira Knightley in Prada
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Keira Knightley wears all Prada, a light-blue silk dress with original pleats, silver calf shoes and a light-blue satin clutch embellished with stones when leaving a Begin Again press conference, New York.
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20
Keira Knightley in Erdem
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Keira Knightley wears Erdem at the 'Begin Again' New York premiere after party at The Bowery Hotel on June 25, 2014