Emilia Clarke reportedly has the edge over Brie Larson since the actress previously worked with director Alan Taylor on the hit HBO series Game of Thrones, where she plays Daenerys Targaryen. Both actresses have tested for the coveted role, although it isn't known when a final decision will be made. Brie Larson is coming off of critically-acclaimed performances in Short Term 12 and The Spectacular Now. Emilia Clarke will next be seen on the big screen in Dom Hemingway.
In related news, the production is also looking for an actor to portray Kyle Reese, the character played by Michael Biehn in The Terminator, who was sent back to 1984 to protect Sarah Connor (Linda Hamilton). The producers are also casting for John Connor, a role which Garrett Hedlund and Boyd Holbrook are reportedly in contetion for. However, the production is focusing on casting Sarah Connor before Kyle Reese and John Connor.
Alan Taylor is directing from a script by Laeta Kalogridis and Patrick Lussier. The movie is expected to be the first in a stand-alone trilogy, with Arnold Schwarzenegger attached to star.
Terminator Genisys comes to theaters July 1st, 2015 and stars Arnold Schwarzenegger, Jason Clarke, Emilia Clarke, Jai Courtney, Matt Smith, J.K. Simmons, Douglas Smith, Dayo Okeniyi. The film is directed by Alan Taylor.