The cast for the live-action Attack On Titan film has been revealed although the only people cast so far is Eren, Mikasa, and Levi. We do not know yet who will play Armin, Sasha, Jean, Marco, or any other characters! So here is the officially announced cast for the movie as of yet.
Haruma Miura - Eren Jaeger
Maki Horikita - Mikasa Ackerman
Shôta Matsuda - Levi
Attack On Titan currently has a 2015 release date in Japan, a teaser trailer is shown below to get a good look at the titans:
I can't wait to see a worldwide version dropped along with further casting!