Despite a good effort to keep her left hand covered, an eagle-eyed paparazzo got a bird's-eye view of what appeared to be a diamond ring on that ringer as Heard was leaving a restaurant last night in Los Angeles.

A source tells E! News, meanwhile, that Heard and another woman hit L.A. restaurant Ago for dinner last night and it was when she was first heading in that the intrepid photographer noticed her hand. Heard was inside for about an hour and a half and, on her way out, she was doing everything to hide her hand, the source said. The actress also waited for the valet driver to open her car door for her, seemingly so as not to have to expose her hand for an extra second.