Mark Zuckerberg, Priscilla Pasta La Vista, Rome

5/29/2012 4:30 AM PDT

Mark Zuckerberg, Priscilla Chan -- Pasta La Vista, Rome

Mark Zuckerberg ditched his hoodie for a more grown up, married look ... as he and Priscilla Chan strolled on a cobblestone road on the Amalfi Coast in Italy. 

It's the second leg of their honeymoon -- they just left Rome.

Good to see Mark smiling, in spite of the fact that his fortune sank from $20 billion to around $17 billion. 

For Zuck, the glass is always half full.