 FAIR: It is often incorrectly claimed that an off screen male voice  calls out "Hiya, Judy" (referring to actress Judy Garland (qv),  not her character, Esther). The voice actually says "Hiya, Johnny".  This refers to Tom Drakes character, John Truett, who has been  trying to catch the trolley and apparently just made it. As soon as  the line is delivered Esther looks expectantly screen right but we  do not see John until the end of the trolley song sequence.