The Island

I went to see "The Island".
I didn't have enough information about this movie, so I had been surprised from the beginning to the end!!!
I think Ewan McGregor and Scarlett Johansson are very good at action movie roles!!
My friend told me Ewan was the first choice of Neo in Matrix. She also said that seven people were offered before Keanu. Really???? I didn't know that!!
I wondered who??? I searched on Google, but I couldn't get any answers....um...Whoever are they???