Leatherman faces four years in state prison if convicted.
The deal on the table called for Leatherman to receive five years of probation and to stay away from Cusack, his business and home for the next 10 years.
She was arrested earlier this year outside the actor's home and has been jailed ever since.
Cusack is expected to testify during the trial.
Slideshow archive | Local events | Contests | Headlines at a glance