Exclusive behind the scenes interview with guest host Regis Philbin: "Yeah, I have a lot of television experience"

As iconic television personality Regis Philbin prepares to guest host "Piers Morgan Tonight," the always-energetic octogenarian is gracious enough to join us for an exclusive behind the scenes interview.

Stopping in the hall outside of his dressing room, the legendary host reveals what goes in to filling Piers Morgan's shoes, and chair:

"Piers is a very special person, you know. I've worked with him before, on 'America's Got Talent.' And it's going to be a lot of fun, I'm looking forward to it."

Kicking off a week of special guest hosts, Philbin will welcome fellow television icon Dave Letterman, for an extremely rare sit down interview:

"You know Dave, you've never seen him anywhere. And I'm delighted. It was his idea to do the show."

Watch the above clip as Philbin opens up about two of his greatest passions – televsion, and Notre Dame football – then tune in tonight at 9 p.m. as he welcomes his longtime friend for an entertaining and enlightening hour.

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