The unlikely couple went public with its relationship last month when the stars were snapped kissing in Los Angeles.
Now Canalis has given the Jackass star a tour of Rome - even dining at the same sushi restaurant the beauty used to frequent with Oscar winner Clooney.
An eyewitness tells the New York Post's Page Six column Canalis and Steve-o couldn't keep their hands off each other and shared numerous kisses throughout their meal.
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