Anil Kapoor
(Slumdog Millionaire)
... as President Omar Hassan, a Middle East leader on a peacekeeping visit to the US who will be threatened with assassination.(Slumdog Millionaire)
Chris Diamantopoulos
(The Starter Wife)
... as Rob Weiss, President Taylor's new Chief of Staff.(The Starter Wife)
Mykelti Williamson
(Forrest Gump)
... as Brian Hastings, the head of New York CTU with a razor-sharp intellect.(Forrest Gump)
John Boyd
(The Notorious Bettie Page)
... as Arlo Glass, a CTU systems analyst.(The Notorious Bettie Page)
Freddie Prinze Jr
(Scooby Doo)
... as Cole Ortiz, a former Marine who runs CTU Field Ops and hero worships Jack Bauer.(Scooby Doo)
Katee Sackhoff
(Battlestar Galactica)
... as Dana Walsh, a CTU analyst in a relationship with field agent Ortiz.(Battlestar Galactica)
Jennifer Westfeldt
(Grey's Anatomy)
... as a recurring journalist called Meredith Reed.(Grey's Anatomy)
Nazneen Contractor
(The Border)
... as the daughter of President Omar Hassan.(The Border)
Clayne Crawford
(Swimfan)
... as a "bad boy" from Dana Walsh's past.(Swimfan)
Actors confirmed as returning to the series are Kiefer Sutherland as Jack Bauer (obviously), Cherry Jones as President Allison Taylor, Annie Wersching as Agent Renee Walker, Mary Lynn Rajskub as Chloe O'Brian, and Elisha Cuthbert as Kim Bauer.