* ActorAllusion: [[Series/{{Glee}} Quinn]]/Sarah used to date the quarterback, then she became one of the misfits.
* CastTheExpert: Greg Townley as Number Three and Damien Walters as the Mogadorian warrior.
** Also Alex Pettyfer as Number Four if you know how physically skilled he really is (watching ''Stormbreaker'', made when he was just 15, may give you an idea).
* DawsonCasting: Played straight as 24-year-old DiannaAgron, 22-year-old Jake Abel and 20-year-old Alex Pettyfer play high school students. 24-year-old TeresaPalmer as 16-year-old Six, too. However, it's averted with Callan [=McAuliffe=] who was 15 at the time of filming, and Greg Townley who was 14: their characters' ages.
* DidNotDoTheBloodyResearch: or ArtisticLicenseAstronomy. According to the film it is nighttime at the same time everywhere in the world. Nope.
* DyeingForYourArt: Alex Pettyfer dyed his blond hair brown for the beginning of the film. Jake Abel dyed his blonde hair brown for the duration of the film. Callan [=McAuliffe=] had his hair dyed darker for the film, but claims to have lost track of its original color because he's dyed it other colors for roles before.
** DiannaAgron continued dying hers blond. TeresaPalmer literally ends up as the only actor without died hair. TheStinger? She's blond and her character had black hair in the book.
** In the book, Sam's hair is also dark blond, as Callan [=McAuliffe=]'s is, so he didn't need to dye it, the inverse of TeresaPalmer.
* HeyItsThatGuy: Agent 47 is TheObiWan.
** [[CatchMeIfYouCan Brian]] [[ThePursuitOfHappyness Howe]].
** [[Series/{{Justified}} Raylan]] is an alien who protects Literature/AlexRider, who can't help falling in love with [[Series/{{Glee}} Quinn]] and butting heads with [[Series/{{Supernatural}} Adam Winchester]]/ [[{{PercyJackson}} Luke Castellan]].
** The Mogadorian leader is Joshua from ''DarkAngel''.
** Number Three is Hit Girl and the Mogadorian Warrior that gets blown up is Film/KickAss.
* NamesTheSame: so Mogadorians travelled to Paradise, Ohio? Should only take about an hour... If you mean Mogadore, OH, a town just outside of Akron.
** [[LordOfTheRings Lorien is also kinda near Mordor]], so I'm surprised the bad guys weren't Mordorians.
* MoneyDearBoy: The author made no secret that he wrote the book to [[FollowTheLeader cash in on]] the popularity of the Literature/Twilight series and try to create a new hit franchise in its stead. That being said, it's much better than something supposedly written as an empty cash grab should be.
* RomanceOnTheSet: Alex Pettyfer and Creator/DiannaAgron became [[PortmanteauCoupleName Dialex]] for a bit.
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