The hit ABC Family murder-mystery drama 'Pretty Little Liars' is already on its fourth electrifying season, but its cast members were relatively unknown (albeit not completely out of the show business world) before landing their current roles.

Below, we have photos of the four main 'Pretty Little Liars' actresses before they signed onto the show -- from their childhood and middle school years, which they spent hanging out with friends, joining clubs, going on family vacations and striking poses. One cast member even spent her time on the set of 'Quantum Leap.'

Check out all the adorable snaps of Ashley Benson, Lucy Hale, Shay Mitchell and Troian Bellisari obefore they were the 'Liars' below!

Ashley Benson

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Lucy Hale

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Shay Mitchell

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Troian Bellisario

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