The former "American Bandstand" host, now 76, will join Ryan Seacrest and musical guest Christina Aguilera to ring in 2007 before a national TV audience of millions. Clark missed the show two years ago when he suffered a stroke but returned to the holiday staple last New Year's Eve.
Seacrest, the 31-year-old host of "American Idol," handled co-hosting duties last year and is expected to eventually succeed Clark as the show's host.
Clark originated the New Year's Eve program back in 1972. The only show he missed followed his Dec. 6, 2004, stroke.