First Miley Cyrus' engagement ring returned ... now Liam Hemsworth is back -- but whether their engagement is back on is the big question, and we posed it directly to Liam.
Hemsworth arrived at LAX last night after a THREE WEEK trip to Australia and the Philippines ... sans Miley, and on the heels of rumors he and January Jones had a fling.
We asked Liam about everything from Miley's disappearing and reappearing diamond ring ... January (the month and the chick) ... and even the quality of gnar Down Under.
Check out the vid ... for some reason Liam keeps his left hand concealed the whole time he's on camera. Not that he'd be wearing an engagement ring, but ... it's just odd.