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Pretty Little Liars

Pretty Little Liars Cast: How Old Are They Really? (PHOTOS)

Spencer Hastings may be applying to colleges on ABC Family's Pretty Little Liars, but in real life, her portrayer Troian Bellisario already graduated college (from the University of Southern California, to be exact) ;— four years ago! Sure, we know most of the actors who play high school students on TV aren’t really in their teens, but a 27-year-old trying to pass as an 18-year-old ;— isn't that a little much? ;

So just how old are the rest of Troian's Pretty Little Liars castmates? We'll give you a hint: none of them are teens (well, except for one recurring guest star) and one of them is even in her thirties! ;We’ve compiled a complete list, organized from youngest to oldest. Think you can guess who the cast’s true youngins are? Click through the gallery to find out!

Catch the ;Pretty Little Liars ;Season 4 Halloween special on ;Tuesday, October 22, 2013 ;at 8 p.m. ET/PT on ;ABC Family.

Crystal Bell ;is an editor at Wetpaint Entertainment and our resident fan-girl for all things Pretty Little Liars, The Vampire Diaries, Game of Thrones and Once Upon a Time. She speaks fluent geek. Follow her on ;Twitter ;and ;Google+!