While we can never keep up with all of the shenanigans on 'Pretty Little Liars,' we do know one thing: That is one good-looking cast! Two of the stars, Keegan Allen and Tyler Blackburn, have gained reputations for their determination to expose A -- and they've looked handsome doing it. Which actor do you think is more swoon-worthy?

Keegan Allen plays the brooding boyfriend of brainiac Spencer Hastings, but he got his start on another teen show, 'Big Time Rush.' The actor loves the arts -- in fact, he's often seen carrying his camera and has recorded videos of himself singing.

Tyler Blackburn joined the serious as a bad boy, but quickly showed he has a heart of gold. His character's deadpan sense of humor scored big with fans, who look forward to seeing the actor on the PLL spin-off, 'Ravenswood.'

Which 'Pretty Little Liars' star is on your A-list? Vote in the poll below!

Keegan Allen

keegan-allen
Toby Canham, Getty Images
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Tyler Blackburn

tyler-blackburn
Jason Merritt, Getty Images
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