Mona is A for the first four books. But in the second four books, there is a NEW A, which ends up being Ali's secret twin Courtney. Technically, the new A IS Ali, but the girl they were friend with was Courtney, and she was passing off as Ali. So the REAL Ali, whose legal name is actually 'Alison', is the new A. For the show they are only following the first four books... so A is still Mona.
As of January 18, 2014, the real big A in Pretty Little Liars is Ezra.
Alisons Real Name Off Of Pretty Little Liars Is Sasha Pieteres
Lucas Gottesman from Pretty Little Liars is played by actor Brendan Robinson.
actress Janel Parrish is portraying Mona on Pretty Little Liars
yes!
The real Alison.
The actress who portrays Aria's mother on Pretty Little Liars is Holly Marie Combs
No she isn't, first it is Mona then it is the real Ali. Look up Pretty Little Liars on Wikipedia, it tells you everything!
Lucy Hale
Alison ; the real one.
Janel Parrish
Sasha Pierterse. :)