Question: Who was a at the beginning of pretty little liars?
Disambiguated questions and answers: question: Which character was a at the beginning of pretty little liars?
Which actress portrayed a at the beginning of pretty little liars?
answer: Mona Vanderwaal
Mona
Janel Parrish
Natural Questions answer: Mona Vanderwaal , (from the Wikipedia article "Pretty Little Liars")