Hilary Duff is in the process of getting sued after being accused of smashing her Range Rover into the back of another car in 2010.

According to the lawsuit, filed yesterday (18.0612) in Los Angeles County Superior Court, Hilary was driving around in the California city on December 12, 2010 when she collided with a vehicle driven by Rachel Owens.

Rachel claims she suffered "great mental, physical and nervous pain and suffering" ... and needed multiple doctors and surgeons to treat her unspecified conditions, according to TMZ.

She also thinks her injuries prevented her from going to work and although she doesn't state her career in the documents, she anticipates she will be "prevented from attending her usual occupation for a period of time in the future."

The alleged victim is suing the actress and singer - who gave birth to her first child in March - for unspecified damages.

The 24-year-old welcomed son Luca into the world with her retired NHL player husband Mike Comrie.

She is currently trying out sensible ways to shift her post-pregnancy weight.