Jack Bauer will play Naked Snake in Metal Gear Solid V: The Phantom Pain, Konami just announced during their pre-recorded E3 press conference.
Kiefer Sutherland, best known for his role as super-agent Bauer in the show 24, will do motion capturing and voice work for the hero of the new Metal Gear game, which takes place after the upcoming Metal Gear Solid: Ground Zeroes (and way before the events of Metal Gear Solid IV).
Naked Snake, as you might remember from MGS3, is actually Big Boss, clone-father to longtime series protagonist Solid Snake. This Bauer news is a big twist for the series: all incarnations of Snake are usually played by the gravelly-voiced David Hayter.
You can see video footage of the Sutherland announcement above.