The Andy Griffith Show
This movie is referenced in the Andy Griffith Show, epsisode titled "Andy and Helen Have Their Day". Andy and Helen go on a picnic and Goober takes them. While getting ready, Goober asks Andy if he's ever seen the movie "The Picnic". Then Goober proceeds to say Cary Grant was in the movie and he can do a take-off on Cary Grant. Helen says Cary Grant wasnt in the movie, it was William Holden. Goober does his "Judy Judy Judy" impersonation anyways!
Look for it sometimes! That episode is hialrious!