* ActorAllusion:
** Possibly -- Natalie Portman's [[Franchise/StarWars ex]] sure is [[RevengeOfTheSith "bad with relationships."]]
** The Son of Coul asks Thor if he received his training with Special Forces. Chris Hemsworth was trained by a former Navy Seal for his role as the god of thunder.
* DyeingForYourArt
** Before he knew he was playing Loki, Creator/TomHiddleston gained 20 lbs of muscle so he could play Thor. Once he knew his actual role, he had to go on a strict diet to lose that muscle.
** Once he was cast as Thor, Creator/ChrisHemsworth, having never worked out before, underwent six months of training with a US Navy Seal and gained so much muscle that when he got fitted for his costume, it was too tight for him.
* EasterEgg: If you look really closely, you can see ComicBook/TheInfinityGauntlet in the arsenal at the start of the movie. This ends up being a CallForward to [[spoiler:''Film/TheAvengers'' and the Franchise/MarvelCinematicUniverse at large]].
* EnforcedMethodActing: The scene where Loki briefly tries to speak up before Thor is banished, but Odin shuts him up with a sort of roar that causes Loki to stumble back, blinking and silenced. According to Hiddleston, the roar was "unscripted genius[...] Terrifying. Magnificent." and his startled shrinking away was not acting.
* FakeBrit: Chris Hemsworth (Thor) is Australian, Jaimie Alexander (Sif) and Joshua Dallas (Fandral) are American.
* HeyItsThatGuy:
** Creator/JMichaelStraczynski (whose work on the comic series has serious influence on the setting and Thor's costume) is the first guy to try to lift Mjolnir, and definitive 80s ''Thor'' writer Creator/WaltSimonson is an Asgardian at the end.
** [[Film/StarTrek George]] [[ChrisHemsworth Kirk]] is Thor Odinson himself.
** [[TheNewAdventuresOfOldChristine Richard Campbell]] is PhilCoulson.
** [[TheHurtLocker Sgt.]] [[Creator/JeremyRenner James]] is {{Hawkeye}}.
** You might recognize Heimdall as [[Series/TheWire Stringer Bell]] and {{Luther}}.
** [[ThePunisher Frank Castle]][=/=][[Series/{{Rome}} Titus Pullo]] sure let himself go.
** [[NataliePortman Padmé]] [[Franchise/StarWars Amidala]] is Jane Foster.
** [[TheSilenceOfTheLambs Hannibal]] [[AnthonyHopkins Lecter]] is Odin the Allfather.
** [[TwoBrokeGirls Max]] [[KatDennings Black]] is Darcy Lewis.
** [[Series/KyleXY Jesse]] is Sif.
** Hogun is [[IchiTheKiller Kakihara]] and [[{{Zatoichi}} Hattori]].
*** And [[GenghisKhan Temujin]], too. Oddly appropriate.
** Odin and [[Creator/StellanSkarsgard Erik Selvig]] are [[Film/{{Beowulf}} Hrothgar]] and... Hrothgar. (From the 2007 ''Beowulf'' film and 2005's ''Beowulf and Grendel'' respectively.)
*** Selvig is also [[Film/PiratesOfTheCaribbean Bootstrap Bill]].
**** And he's also [[TheMillenniumTrilogy Martin Vanger]].
** Fandral is [[Series/OnceUponATime Prince Charming]].
* ICallItVera: Thor and Loki both wield named weapons: Mjölnir, the hammer, and Gungnir, Odin's spear. Clark Gregg, who plays Agent PhilCoulson, felt that he also should have a named weapon, so he christened his sidearm "Glockenspiel."
* [[PlayingAgainstType/FilmDirecting Playing Against Type: Film Directing]]: KennethBranagh, better known for Shakespearean films, took a turn at directing a superhero flick.
* StarMakingRole: Creator/TomHiddleston was virtually unknown before playing Loki, and is now one of the online fandom's most beloved stars.
* ThrowItIn:
** Anthony Hopkins improvised his reaction to Thor's CallingTheOldManOut speech. Apparently, crew members were [[{{Tearjerker}} bursting into tears]] on the set during filming.
** Odin's terrifying and definitely unscripted growl when Loki attempts to intervene deserves a mention by itself.
* WhatCouldHaveBeen:
** '''[[Creator/BrianBlessed BRIAN BLESSED]]''' was originally slated to play Odin. Zachary Levi of Series/{{Chuck}} and Stuart Townsend had both been cast as Fandrall before Joshua Dallas took over. Creator/AlexanderSkarsgard was also tested for the role of Thor, which would have made for an interesting dynamic considering his dad is playing Erik. Creator/DanielCraig, and Channing Tatum were also considered for the role of Thor,.
** Let's not forget that blue-eyed, blond-haired, 6'2", classically trained Creator/TomHiddleston originally auditioned for the role of Thor, even going so far as to put on 3.5 stone (that's 49 lbs!) of muscle for the part. He [[Comicbook/{{Loki}} didn't get the role]] of Thor, but [[{{Understatement}} things turned out pretty okay for him regardless.]]
** Not only does [[Series/{{Rome}} Titus Pullo]] play Volstagg, but Kevin [=McKidd=] (AKA [[Series/{{Rome}} Lucius Vorenus]]) was originally slated to play Dr. Donald Blake before the character was cut from the story. If he'd stayed in, [[HeterosexualLifePartners Pullo and Vorenus]] would've gotten one hell of a reunion.
** A scene [[WhatCouldHaveBeen was present]] [[http://www.imsdb.com/scripts/Thor.html#6360 in the original script]] where Loki did reveal himself to Laufey [[spoiler: as his son]]. Laufey then admitted [[spoiler: his ParentalAbandonment of him]]. Therefore, Loki's [[AntagonisticOffspring antagonistic behaviour]] toward Laufey would have a more logical explanation.