Question: who is the a group in pretty little liars?
Answer: The A-Team members revealed are CeCe, Mona, Toby, Spencer, Sara, Lucas and Melissa. The current known members of the A-Team seem to be Big A and Melissa. It is later revealed that the members are CeCe Drake and Sara Harvey. It was implied in "A Dark Ali" that Melissa was one of "A's" workers.