How old was Sienna Miller in South Kensington?

It's common to wonder how old a celebrity was when they starred in a particular film. Knowing that can offer insight into their career stage and personal growth. Let’s reveal how old they were when the cameras rolled.

At the time South Kensington was made, Sienna Miller was:

19 years old

That was the real age of the celebrity according to our calculation.

Our method involved using the first calendar day of the release year of South Kensington:

January 1, 2001

And the day Sienna Miller was born, which is:

December 28, 1981

Since movies are typically released within a year of filming, Sienna Miller could have been a year younger or older than the displayed age during certain scenes.