"Pretty Little Liars" star Ashley Benson celebrated her 21st birthday at Blush Boutique Nightclub in Las Vegas on December 21.

Ashley is also known for playing Abby Deveraux on "Days of Our Lives," and she starred in the now-canceled TV series "Eastwick."She also starred in "Bring It On: In It To Win It."

She now appears as Hanna Marin on Pretty Little Liars on ABC Family.

See more photos of Ashley here!