Knightley played Sabé, Queen Amidala's handmaiden and decoy, which gained her early recognition due to her resemblance to Natalie Portman, who played the Queen.

This British film was a critical and commercial success, giving Knightley wider recognition for her role as Jules Paxton. This was a breakthrough film for her and cemented her reputation as a talented and versatile actress.

Knightley starred as Elizabeth Swann in the first installment of the highly successful 'Pirates of the Caribbean' franchise. This role launched her into international superstardom and cemented her place as a leading lady in Hollywood.

Knightley reprised her role as Elizabeth Swann in 'Pirates of the Caribbean: Dead Man's Chest' (2006) and 'Pirates of the Caribbean: At World's End' (2007), further solidifying her popularity and box office draw.

During this period, Knightley starred in a string of successful period dramas, including 'Pride & Prejudice' (2005), 'Atonement' (2007), and 'The Duchess' (2008). These roles showcased her versatility and earned her critical acclaim.