Young Lola Models In The Movie Atonement, Were There Two Actresses Playing Lola (older And Younger)?

In the movie Atonement, were there two actresses playing lola (older and younger)? - young lola models

I just saw Atonement, which a great film, certainly, but I was a little bit confused. Credits on IMDB by just an actress playing Lola ... But in the film, an older version of it in the role of the film and at the wedding. I think it is a way that would be the same girl, she looks much older ... Can someone enlighten me on this? I mean, I believe in the magic of Hollywood and all, but the simple fact that there are much bigger than I thought there were two actresses.