Peter Bogdanovich believes that the genesis of the imitation came from Grant’s delivery in several lines in Only Angels Have Wings.. ‘In the film his former girl friend is called Judith or Judy (played by Rita Hayworth). Cary has lines like “Hello, Judy. Come on, Judy. Now, Judy.” But he never said “Judy, Judy, Judy.” ‘
Judy Quine has another explanation: ‘Cary told me back in 1955 that when he did the Lux Radio Theater, they used his voice introduction for Judy Garland, who was a guest for the following week. He recalled some banter where he could have said “Judy, Judy, Judy,” but he wasn’t sure.’
Although Grant must have tired of being constantly asked to say the line, he always obliged when women named Judy asked him to say ‘Juday, Juday, Juday.’ And Rich Little admires Grant’s sense of humor about it: ‘Cary said [Little imitating CG], “Where is this ‘Juday, Juday, Juday’ coming from? I don’t know anybody named Juday-Juday-Juday. The only Judy I knew was Judy Garland. And when I saw her, there weren’t three of ’em!” ‘
During the making of Charade Peter Stone used to joke with Grant about ‘Judy, Judy, Judy.’ He recalls: “While we were shooting the taxi scene – right near the end of the picture where Audrey’s feet are up in his lap and he’s massaging them – Cary looked at the camera and said [Stone imitating CG] “Juday, Juday, Juday. There. Now you’ve got it on film!'”
As late as the 1980’s Grant was still answering questions about the phrase, and during on of his Conversations he offered still another speculation on how it came about.
CG: We looked up track after track and outtake after outtake. As far as we can tell, I never said it. We think it started with a celebrity impersonator by the name of Larry Storch. He apparently was appearing in a nightclub and doing me when Judy Garland walked in. And that’s how he greeted her.