Regis Philbin

Regis Philbin intends to take some time off from Live with Regis and Kelly to undergo hip-replacement surgery.

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"I'm allowed to announce I'm going into hip surgery. I'm going to have my hip replaced. I've been limping around here. It's really painful," he said on Monday's Live, which is broadcasting from Las Vegas this week.

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The surgery is scheduled for Dec. 1. Philbin, 78, is expected to take four to six weeks off to recover. "I'll be back next year," he said, though he didn't offer a firm date.

Guest hosts have not been announced yet.