There is no movie.. Only books and the TV show.
But if you are asking about the episode where Spencer is dreaming that they are in the movies it is IAN who texts them.
The name is A, her identity is unkown
it is alison's sister
Hanna, Emily, Spencer, Aria, and Alison are the girls on Pretty Little Liars
Monda knows secrets about the girls in Pretty Little Liars from cameras and rumors.
Doctor Anne Sullivan is the therapist on Pretty Little Liars
Yes
no
nope.
Nope
The girls on the cover of the Pretty Little Liars series are Hanna, Aria, Spencer, Emily and i think Alison is on one of them.
None of the Liars are going to.
None of the liars are dead.