Gunton will reprise his turn as Ethan Kanin, who served as Secretary of Defense last season. Gunton's return was announced Sept. 19 with a slew of new cast members including Janeane Garofalo, Annie Wersching, Jeffrey Nordling, Rhys Coiro and John Billingsley.
Jones (Doubt) had previously been reported to assume the role of President Allison Taylor. Colm Feore (Julius Caesar) will play First Gentleman Henry Taylor. Also slated to return to the series are Carlos Bernard, Mary Lynn Rajskub and James Morrison.
The TV series follows one (rather eventful) day (the title referring to 24 hours) in the life of federal agent Jack Bauer (Sutherland). Each of the 24 continuous weekly episodes in a season shows what unfolds in one, real-time hour. A ticking clock occasionally appears, fueling the show's signature intensity.
Gunton played the lead role in the 1989 Broadway revival of Sweeney Todd and has also appeared in the original stagings of Big River, Passion, Evita, King of Hearts and Working. His TV credits include "Greg The Bunny," "Judging Amy," "Nip/Tuck," "Desperate Housewives" and "Pepper Dennis." His film work includes "The Shawshank Redemption," "The Perfect Storm," "Patch Adams" and the upcoming "Rendition."
Jones, Gunton and Feore join a list of previous "24" guest stars who also have stage credits including Jayne Atkinson (Enchanted April), Stephen Spinella (Angels in America), Jean Smart (The Man Who Came to Dinner), Peter MacNicol (Crimes of the Heart), Zeljko Ivanek (The Pillowman), Gregory Itzin (The Kentucky Cycle), Tamara Tunie (Julius Caesar), Logan Marshall Green (King Lear), Harry J. Lennix (Radio Golf), Lou Diamond Phillips (The King and I) and James Cromwell (Hamlet), among others.
For more information on "24," visit the official website at fox.com/24.