The foursome were presented the Cast To Watch award by The Vampire Diaries‘ Kat Graham, who received the award at last year’s event.
Lucy, 21, who wore a Miriam Haskell bracelet and carried a Kotur clutch, spoke on stage and thanked her costars for being beautiful inside and out.
Shay, 23, wore stunning, spikey Ruthie Davis heels and Ashley, 21, was also spotted out earlier in the day picking up some Jamba Juice.
Troian wore a gorgeous white chiffon gown with crystal covered bust from alice + olivia by Stacey Bendet.
35+ pics inside of Pretty Little Liars at the Young Hollywood Awards…