Many over the years - most memorable for loveliness are
Andre Previn in First asking me who the gentleman on the other side was because he had been asked for even more autographs than him - it was George Michael and Mr Previn hadn't heard of him!
Rik Mayall sat on a jumpseat chatting across the atlantic.
Cliff Richard and his leather trousers v. charming.
George Michael (again) asking for seconds - likes airline food apparently.
Tom Jones and missus - tiny folk.
Rowan Atkinson - funniest face even when he's just sat thinking.
Steven Fry, charming and unassuming
Duchess of Kent - most gracious when crewmember thought he knew her!
and for other reasons:-
Sir Bob - his assistant has to speak for him as he can't be bothered
Lisa Minelli and David Guest on their honeymoon - most bizarre behaviour
Corrie 'star' no-one recognised who desperately wanted to give someone an autograph
The Daily Star topless models who crowded into the cockpit and gave the FO the happiest day of his life!