* ActorInspiredElement:
** Lisa did not exist in the original story. Screenwriter John Michael Hayes was encouraged to spend time with Creator/GraceKelly before writing for her. As a result many of Lisa's characteristics were inspired by Kelly.
** Georgine Darcy choreographed most of her dance moves.
* CastTheExpert: Ross Bagdasarian playing a songwriter.
* CreatorsFavoriteEpisode: Creator/JamesStewart named this as his favourite of his collaborations with Hitchcock.
* DeletedRole: Joe Flynn (of later ''Series/McHalesNavy'' fame) filmed a scene that ended up getting cut.
* EnforcedMethodActing: One elaborate set involved the outside of a bunch of buildings, and one scene where a man and a woman on the "back porch" were supposed to go back inside through one of two windows, carrying the mattress they had out back in, when it started to rain. Hitchcock told them to go into different windows, so when the scene came, their confusion was real, but it made for a very convincing portrayal of people surprised by the rain and trying to get back inside in a hurry.
* MethodActing: Hitchcock instructed Georgine Darcy ("Miss Torso") ''not'' to take professional dance lessons, so as to convincingly play an enthusiastic amateur.
* PlayingAgainstType:
** Creator/JamesStewart, usually cast as a NiceGuy, plays a character who has bitter ideas about marriage and a touch of voyeurism in him. These darker aspects became a bit of a theme in the actor's post-World War II career.
** Creator/RaymondBurr, better known for his heroic characters like Series/PerryMason, Series/{{Ironside|1967}}, and [[Film/GodzillaKingOfTheMonsters1956 Steve Martin]], plays the villain.
* ProductionPosse: One of four films that Creator/AlfredHitchcock made with Creator/JimmyStewart (along with ''{{Film/Rope}}'', ''Film/TheManWhoKnewTooMuch'' and ''{{Film/Vertigo}}''), and one of three he made with Creator/GraceKelly (along with ''Film/DialMForMurder'' and ''Film/ToCatchAThief'').
* UncreditedRole: Creator/GigYoung, as TheVoice of Jeff's editor Gunnison.
* WhatCouldHaveBeen: Jeff was originally to speak with his editor in the editor's office, and the scene was filmed on an office set with Creator/JamesStewart and Creator/GigYoung. Hitchcock decided that leaving the apartment was too much of a distraction, however, so the scene was relocated to the apartment and took place over the phone instead.
* WriteWhoYouKnow: Hitchcock had Creator/RaymondBurr make his characterization of Lars Thorwald into a very specific TakeThat to [[https://en.wikipedia.org/wiki/David_O._Selznick David O. Selznick]], who Hitchcock [[WeUsedToBeFriends had a very public falling-out]] with. The grey hair and glasses and various mannerisms of Thorwald were based on Selznick.

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