A


 * -| Mona=

The original and first "A", who became "A" initially to get back at Alison but started back up out of fear of losing Hanna.
 * -| Toby=

A member of the A-Team, who was recruited by Mona when he got his job in Bucks County. He claims he joined in order to protect Spencer.
 * -| Spencer=

A member of the A-Team, Spencer joined in order to find answers on her seemingly deceased boyfriend Toby. She kidnapped Malcolm Cutler to prove herself to Mona and worked as a spy as well. However, upon realizing that Toby is alive, she becomes a double agent.
 * -| CeCe=

The second "A" and Red Coat, Charlotte became "A" to get out of Radley and get closer to her family, however she also became "A" because Mona told her the Liars were happy that Alison was gone. Her later motive was addiction to the game.
 * -| Sara=

Charlotte's friend and ally, she was hired by Charlotte to work as Red Coat and the Black Widow, in order to distract the Liars from Alison. Her motive for this is unknown, however she claimed to the authorities that it was Stockholm Syndrome. "A" is the main antagonist of the ABC Family original series "Pretty Little Liars".

In the series' second season finale, Mona Vanderwaal is revealed to be "A". But when she is sent to Radley Sanitarium for treatment, she is approached by an unknown person who wants a partnership. This person, known as Big A, starts a team of "A's" called the "A-Team", consisting of Mona, Toby Cavanaugh, and Spencer Hastings. In the third season finale, the "A-Team" is disbanded and Big A begins working only with Sara Harvey.

Known "A's"

 * Mona Vanderwaal
 * Toby Cavanaugh
 * Spencer Hastings
 * Melissa Hastings
 * Lucas Gottesman
 * CeCe Drake
 * Sara Harvey
 * Uber A