I've met a few celebrities. ON a flight to LAX from JFK a few years ago I met Wilmer Valderama from That 70's Show. have a picture somewhere, gotta look for it
On my flight from LAX to JFK after first days of Sukkos Kevin James was in First, I was in Business. No picture bc it was a redeye
On my most recent flight on BA to LHR from JFK (thanks Dan for the deal!!) Emily Blunt and John Krasinski (The Office) and their daughter were on my flight sitting next to us in Business on the Upper Deck. Very nice normal family.
When I was younger Kareem Abdul Jabar was flying first class to Maui on my flight, but he was a real jerk.