George Clooney -- My Secret Fiancee Was Exposed ... by My Secret Fiancee

George Clooney tried like hell to keep his engagement to Amal Alamuddinhush hush -- and damn near pulled it off ... Amal's law firm got involved and blabbed to the world.

Here’s a tip future Mrs. Clooney -- Mr. Clooney likes his privacy. So… shhh!!!