"Men's bags. See ya later," the comedian and actor tweeted after discovering the online shopping hub on Monday.
The long-awaited reunion follows its predecessors "Father of the Bride" and "Father of the Bride Part II" from 1991 and 1995, respectively.
"That wasn't a question, I was saying that to the president. Pardon me!" Martin's Stone appealed.
"I think a new comedian is Jerry Seinfeld. That's how behind the times I am."
Letterman shared a special Top 10 as part of Martin Short and Steve Martin's comedy tour.
The best moments from SNL's 40th anniversary special included cast audition tapes and a "Weekend Update" reunion with Tina Fey, Amy Poehler and Jane Curtin.