How old was Keira Knightley in Atonement?

Age is one of those behind-the-scenes facts that fans love to uncover. That detail can add a new layer of appreciation to their performance. Let’s take a closer look at that intriguing number.

Keira Knightley, while participating in Atonement, was:

21 years old

Based on our estimate, that was the actual age of the celebrity at the time.

The calculation of the shown age took into account the first day of the year in which the movie Atonement was released:

January 1, 2007

And the date of birth of Keira Knightley:

March 26, 1985

Since the release usually follows filming within a year, the age of Keira Knightley during the actual shoot may have been a year more or less than indicated.