Release dates
May 16, 2014

“An epic rebirth to Toho’s iconic Godzilla, this spectacular adventure pits the world’s most famous monster against malevolent creatures who, bolstered by humanity’s scientific arrogance, threaten our very existence” — Legendary Pictures

Some roles are yet to be named or specified.
Aaron Taylor-Johnson as Lieutenant Ford
Bryan Cranston as Scientist Joe Brody
Elizabeth Olsen as Elle Brody, daughter of Joe Brody and Ford’s girlfriend.
Ken Watanabe as Daisuke Serizawa
Juliette Binoche as Sandra Brody
David Strathairn as Adm. Stenz
Richard T. Jones as a military figure “The Colonel”
Victor Rasuk as Major Tre Morales
Akira Takarada (unspecified)
Sally Hawkins as a scientist
Yuki Morita as Akio’s mother
CJ Adams as Sam Brody,Ford’s stepbrother
Jared Keeso as Jump Master
Patrick Sabongui as Master Sergeant Marcus Waltz
Al Sapienza as Huddleston
Brian Markinson as Whalen
Carson Bolde as Sam
Ken Yamamura (unspecified)
Raj K. Bose as Mine employee (uncredited)
Christian Tessier (unspecified)
Warren Takeuchi as Akio’s father
Anthony Konechny (unspecified)
Primo Allon as Mine Team Member
Jeric Ross as Dying Man in Triage
Jake Cunanan as Akio

Plot and Character list from Wikipedia