Christian Bale (John Connor), Anton Yelchin (Kyle Reese), Sam Worthington (Marcus Wright), Bryce Dallas Howard (Kate Connor), Moon Bloodgood (Blair Williams), Common (Barnes), Helena Bonham Carter (Dr. Serena Kogan), Michael Ironside (General Ashdown), Roland Kickinger (T-800), Jane Alexander (Virginia), Chris Browning (Morrison), Dorian Nkono (David), Terry Crews (Captain Jericho), Treva Etienne (Len), Kevin Wiggins (General Olsen), Ivan G'Vera (General Losenko), Dylan Kenin (Turnbull), Greg Serano (Hideki), Michael Papajohn (Carnahan), Anjul Nigam (Rahul), Chris Ashworth (Richter), Beth Bailey (Lisa), Isaac Kappy (Barbarosa), Rafael Herrera (Mexikanischer Ehemann), Greg Plitt (Mischling), Buster Reeves (Tunney), Lorenzo Callender (Kommunikationsoffizier), Babak Tafti (Malik), Boots Southerland (Aufseher), Victor J. Ho (Mark), Po Chan (Naima), Jadagrace Berry (Star), Bruce McIntosh (Priester)