* ActorSharedBackground: John Robie mentions that as a youth he was in a trapeze group that travelled around Europe. In RealLife, Creator/CaryGrant was in an acrobatic troupe that toured around Europe (and eventually brought him to America) when he was young.
* CareerResurrection: Creator/CaryGrant had announced his retirement from acting in February 1953, stating that since the rise of MethodActing, most people were no longer interested in seeing him. He was also angry at the way Creator/CharlieChaplin had been treated by the HUAAC. He was lured out of his retirement to make this movie, and thereafter, continued acting for a further eleven years.
* ChannelHop: Among the six movies that Creator/AlfredHitchcock directed for Creator/{{Paramount}}, only this one averted it when rights to four of the other five went to Hitchcock's estate, and ''Film/{{Psycho}}'' to Creator/{{Universal}}.
* TheDanza: Jessie Royce Landis as Jessie Stevens.
* DawsonCasting: Danielle is a teenager and she says that Francie looks old. She was played by Brigitte Auber, who was 29 at the time (born April 27, 1925), and more than four years older than Creator/GraceKelly (born November 12, 1929).
* [[PlayingAgainstType Directing Against Type]]: The movie is markedly different from Hitchcock's usual style.
* ExecutiveMeddling: Hitchock and screenwriter John Michael Hayes clashed a lot during production, as Hitchcock wanted the film to go a different way than how Hayes did.
* NoStuntDouble: Creator/GraceKelly was obligated to do her own driving during the high-speed chase scene, even though she was not a confident driver.
* PopCultureUrbanLegends: There are persistent rumours that Creator/GraceKelly's fatal car accident in 1982 occurred at the spot where she and Creator/CaryGrant stopped for a picnic, or at least on the roads along which she is seen [[DrivesLikeCrazy driving recklessly]]. Her son, Prince Albert II of Monaco, has denied this.
* ThrowItIn: The lines in the picnic scene, when Francie asks John, "Do you want a leg or a breast?" and he responds, "You make the choice," were improvised.
* UncreditedRole: Alec Coppel (best-known for co-writing ''Film/{{Vertigo}}'') made uncredited contributions to the screenplay.
* VacationDearBoy: Creator/AlfredHitchcock made the film because he fancied a holiday in the south of France.
* WhatCouldHaveBeen: [[http://www.scribd.com/doc/17716412/To-Catch-a-Thief-Screenplay The original script's ending]] resolves a lot more than the actual film's ending does, including the arrest of the BigBad (though the scene blatantly hints that he and Danielle have a getaway plan in the works). But apparently much to the scipt writer's dismay, [[ExecutiveMeddling Hitchcock changed it]] so that the film ends rather abruptly and with a joke. Hitchcock had wanted to do something similar with ''Film/StrangersOnATrain'', end the film at Guy's acquittal, but the studio wouldn't let him.
* WorkingTitle: ''Catch a Thief''.
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