9:45 AM PT -- Turns out, Armie Hammer's "mystery blonde" isn't such a mystery ... it's his ex-girlfriend, Lisa Perejma. The two reportedly split last year, but it appears they're back on good terms.
Armie Hammer's closed the book on a lot of drama in his life -- and now, he's turning the page with a little summer getaway ... with a new woman in his life.
The actor -- who has mostly remained out of the public eye for the past 2 years -- was spotted out in the Italian city of Santa Margherita Wednesday ... where he was dressed in a breezy outfit, and rocking sandals to boot. He also had company ... of the mysterious blonde variety.
The pair walked down the street, side by side. There weren't a whole lot of other people around -- and doesn't seem like anybody really recognized/bothered 'em.
Eyewitnesses tell us they hit up a little pizzeria that was mostly secluded and tucked away. By the looks of it -- they kinda had the space to themselves. We're told they sipped coffee and chitchatted with one another ... looking totally comfortable and relaxed. They also shared a kiss and held hands so, yeah, it's romantic.
Armie's been cleared after the LAPD investigated him for almost 2 years after a rape allegation, but the case went nowhere. The D.A. turned thumbs-down for lack of evidence, so he's clearly getting on with his life.