'Pretty Little Liars' Cast -- Who'd You Rather?

Who's the prettiest little liar of them all?

You don't have to be a detective to see that the cast of the murder-mystery show "Pretty Little Liars" is packed with some serious babes... and to prove it they all squished together for a picture at a TV fan festival last night in Los Angeles.

Here's 24-year-old Ashley Benson (left), 26-year-old Shay Mitchell (center left), 24-year-old Lucy Hale (center), 28-year-old Troian Bellisario (center right) and 18-year-old Sasha Pieterse (right) all pressed together for one big festive photo.