It's been 14 years since the entire cast of "Will & Grace" has been on Ellen, and Eric McCormack, Debra Messing, Sean Hayes and Megan Mullally had no recollection of it! Plus, Debra said she got emotional over her Hollywood Walk of Fame star being next to Eric's, and Sean revealed he's still going to physical therapy after guest-hosting The Ellen Show, and they all shared their memories of filming the pilot 20 years ago.

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