Some actors, like Shay Mitchell and Ashley Benson, were actually in their 20s or 30s even though they were playing young teenagers on-screen.
Pretty Little Liars' Cast: Where Are They Now?
Pretty Little Liars' Cast: Where Are They Now?
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Pretty Little Liars Stars Shay Mitchell, Troian Bellisario, Lucy
Ashley Marin's Instagram, Twitter & Facebook on IDCrawl
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What the Liars would have looked like if they were the character's
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Bianca Lawson's Instagram, Twitter & Facebook on IDCrawl
Pretty Little Liars (season 1) - Wikipedia
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This is how old the cast of Pretty Little Liars were compared to