Rosie O'Donnell -- I'm Officially Done with This Marriage ... Divorce Papers Filed

Rosie O'Donnell filed divorce papers Friday ... 3 weeks after announcing she and Michelle Rounds were splitting.

Rosie filed in Manhattan, and in the docs she calls the marriage "an irretrievably broken relationship." The papers also reveal they have a prenup, according to People ... which first reported the filing.

In the docs, O'Donnell says they've been separated since November.

She dropped the bombshell of their break-up at the same time she first revealed she was leaving "The View."