Ryan Giggs, the welsh player who played for Manchester United, has played the most CHampions League games. He has played 141 champions league games.
Francisco Gento won the Champions League 6 times playing for Real Madrid.
The Real Madrid player Alberto Di Stefano won the champion league five times the most by a player.
real madrid with 9 times
Most likely the youngest player to play in the champion league is Lionel Messi of Argentina, and Barcelona.
Messi has scored 71 Champions League goals for Barca. Incidentally, this is also the record for most Champions League goals by a single player.
it's of course Thierry Henry.
It is the Italians Paulo Maldini and Alessandro Costacurta.