In a nod to Mr Trudeau's fondness for statement socks, he wore Canada-themed mountie and maple leaf print ones to welcome his first foreign visitor.
Mr Trudeau opted for a more subtle striped pair on his first official engagement in the Republic of Ireland.
The Canadian premier is in the country for a three-day visit.
Away from talk of socks, trade issues are set to dominate the agenda, with the Canada-EU free trade deal expected to be a focal point of talks between the two leaders.