PAULA PATTON: Files for Divorce From Robin Thicke

All the pleading and begging didn't work. Paula Patton has filed for divorce from Robin Thicke after nine years of marriage.

Paula, who cites those ol' irreconcilable differences, is seeking joint legal and physical custody of their four-year-old son Julian.

TMZ says "the divorce is 'harmonious' and there are no real issues that will cause a conflict."