引用:

Dennis Quaid as Professor Jack Hall, government climatologist and father of Sam Hall.
Jake Gyllenhaal as Sam Hall, teenage son of Jack and Lucy Hall.
Emmy Rossum as Laura Chapman, love interest and classmate of Sam Hall.
Ian Holm as Professor Terry Rapson, colleague of Jack Hall stationed in Scotland.
Sela Ward as Dr. Lucy Hall, physician/doctor, wife of Jack and mother of Sam.
Christopher Britton as Vorsteen, associate of Jack.
Arjay Smith as Brian Parks, best friend and classmate of Sam Hall.
Dash Mihok as Jason Evans, friend and colleague of Jack.
Jay O. Sanders as Frank Harris, friend and colleague of Jack.
Sasha Roiz as Parker, an astronaut aboard the International Space Station.
Austin Nichols as J.D., rival turned friend of Sam.
Adrian Lester as Simon, colleague and friend of Terry Rapson.
Tamlyn Tomita as Janet Tokada, Hurricane specialist for NASA, colleague of Jack Hall.
Glenn Plummer as Luther, a homeless man in New York City.
Perry King as President Blake, the President of the United States.
Kenneth Welsh as Raymond Becker, Vice President of the United States who ends up becoming the President of the United States.
Amy Sloan as Elsa, a woman who remains in the library and survives with the group.
Sheila McCarthy as Judith, the librarian.
Nestor Serrano as Gomez, director of NOAA.