Alec Baldwin has been whatever the opposite of shy is when it comes to publicizing his relationship with his much-younger yoga instructor girlfriend Hilaria Thomas.

Alec Baldwin was on Letterman last night to promote 30 Rock going into syndication this week on Comedy Central and WGN America, and since we're already celebrating this week as Jack Donaghy week in America, unofficially, we'd be failing all of you if we didn't post the interview, as it was almost as rollicking and hilarious as the rollicking and hilarious interview Letterman recently did with Harrison Ford.