That was over 7 years ago in 2015.
Today she is 40, and has starred in 34 movies in total, 12 since Foxcatcher was released.
In Foxcatcher, I think Sienna Miller looks:
Foxcatcher scores 6.5 out of 10 on The Movie Database.
Sienna Miller's first acting role was as 'Sharon' in South Kensington, released in 2001 when she was 19.