This morning, 80-year-old Regis Philbin embarks on his final farewell from the morning talk show he has co-hosted for over twenty years (#RegisFarewell is trending on Twitter right now). The other day we looked back at Regis throughout the years, and last night David Letterman (a huge fan of the Reeg) gave him the Top 10 treatment, with "Top 10 Things We'll Miss About Regis" (he also predicts we'll all need therapy when we realize Regis isn't coming back to our television screens—although Regis is calling this a leave, because he doesn't like the word "retirement"):

If you head over to the show's website, you can dive down a rabbit hole of memories, but we especially like this video narrated by Alan Alda:

Here are some scenes from this morning, before the show began:

via dialkyle and Regis and Kelly

Update: Mayor Bloomberg is on the show, suggesting that Philbin be a cab driver or work at Gray's Papaya. Guests in the audience include Diane Sawyer, Donald Trump, Tony Danza and, yes, Kathie Lee Gifford. There is a montage of various celebrities doing Regis impressions—Dana Carvey, Martin Short, Jimmy Fallon, Ben Affleck, Amy Poehler, Neil Patrick Harris and Kelly herself—as well as montages featuring his wife Joy and daughters Jennifer and JJ.

Via Regis & Kelly

Update: At the end of an emotional show, including a performance of "Seasons of Love" by the current cast of Rent, Disney president Bob Iger presented Philbin with a plaque outside the ABC Studios at Columbus and 67th Street. And that seemed rather anti-climactic: As one person Tweeted, "Watching last #RegisandKelly. I'm sure #Regis loved having ABC president dedicate plaque 2 him-instead of renewing his contract on his terms."