The hair clearly isn't doing him any favours - but CHECK OUT the legs....

Clooney was clocked for the first time on the set of Hail Caesar dressed as the Roman dictator Julius Caesar, filming in downtown Los Angeles.

And here's one of the skirt in full swing...

I know he's George Clooney, 'n all, but this really puts the time Joey Tribbiani was working in Vegas into perspective. Joey, you rock.