"Snow White and the Huntsman" director RUPERT SANDERS is getting divorced.  His wife, model Liberty Ross, filed last week.  They'd been married for 10 years and have a 7-year-old daughter and a 5-year-old son.

Of course, this is a direct result of Rupert's affair with KRISTEN STEWART over the summer.  A source says, "Liberty is the kind of person who wouldn't really ever get over it."

Despite recent break-up rumors, it appears that Kristen and ROBERT PATTINSON are still together.