Day the Earth Stood Still, The (2008) - Cast

Keanu Reeves as Klaatu
Jennifer Connelly as Helen
Kathy Bates as ?
John Cleese as Dr. Barnhardt
Jaden Smith as Jacob
Jon Hamm as Dr. Granier
Aaron Douglas as Sgt. Winter
Alisen Down as Laptop Woman
J.C. MacKenzie as Grossman
Mousa Kraish as Yusef
Hiro Kanagawa as Dr. Ikegawa
Lorena Gale as Scientist #2
Richard Tillman as Army Sargeant
Patrick Sabongui as Soldier #1
David Richmond-Peck as Polygraph Operator
Sunita Prasad as Rouhani
Serge Houde as Scientist