Though her usual palette only includes black, white, and ivory, Knightly's light green Erdem dress for the Anna Karenina premiere in LA brought a bit of color to her collection, while her decision to eschew jewelry kept with her well curated style.
Embracing a grecian look, Knightly paired romanticism with a hint of sexiness in her Rodarte gown for the 2007 U.K. premiere of Atonement.
In keeping with her theme of dressing, Knightly stayed true to Rodarte and the romantic Roman feel for the LA premiere of Atonement.
In a departure from her usual color scheme, Knightly chose for an opulent blue strapless gown with black detailing and precious bows for the London premiere of The Duchess.
What could be more romantic than a loose, swept up hairstyle, accented by a simple flower?
Sweetly peering out from her bangs, Knightly shows off the always popular little white dress at the after party for the UK premiere of The Young Victoria.
As well as she's known for her penchant to pick period films, Keira Knightly regularly opts for the romantic style of dressing. In 2011, she appeared at the premiere of A Dangerous Method at the Venice Film Festival in a long sleeved Valentino couture gown, the epitome of romance.
Simple and sweet - Knightly looks every part the romantic in a vintage style Elie Saab couture lace mini dress for the 2011 Toronto International Film Festival while promoting "A Dangerous Method."
For the premiere of "A Dangerous Method" at the 55th BFI London Film Festival, Knightly showed a hint of skin with a strategically placed cut out, but the tea length of her Roksanda Ilincic dress brought back her sweet and classic touch.
Is anything more romantic than Chanel? For the UK premiere of Anna Karenina, Knightly donned a Chanel couture gown with sweetly sheer sleeves and decorative floral appliqués.