I agree with Irish in that I couldn't care less about his Knighthood. Heck, Elton John is Knighted, and he is not even a Sir.
Kidding aside, Alec Guinness is a wonderful actor who played in one of my favorite movies of all-time, Lawrence of Arabia.
Guinness gets much deserved credit for his Tony and Academy Awards, but few speak of his service with the Royal Navy in WWII. He should be commended for that as well.