Rex Harrison's singing voice
I thought Rex Harrison notoriously couldn't -- or wouldn't -- sing; is he dubbed here? (And why choose to cast him as a singer, of all professions? After all, for the purposes of the plot, the character could equally well have been a pier-end juggler, or any other down-at-heel and faintly comic entertainer...)
~~Igenlode, who has the original cast recording of "My Fair Lady"
Gather round, lads and lasses, gather round...