"That Certain Feeling" originated on Broadway under its original title "King of Hearts" with Cloris Leachman and Jackie Cooper in the Saint and Hope roles.
Bob Hope's adopted daughter, Linda Hope, briefly appears; however, she had no lines and was standing at a filing cabinet with her back to the camera.
Bob Hope and Eva Marie Saint were respectively aged 53 and 35 when they filmed their roles as a formerly married couple. Hope and Saint were to play a married couple in Cancel My Reservation (1972) filmed when their ages were respectively 69 and 48.
Jan Bradley's debut.