Prince William and Kate Middleton -- also now known as the Duke and Duchess of Cambridge -- were met by protestors in Montreal Saturday night, CNN International reports.
The small group carried signs opposing the monarchy. Canada is a member of the Commonwealth of Nations, which was once a part of the British Empire.
"Down with the monarchy!" shouted a group of about 60 people outside a children's hospital. "French Quebec!" and "Parasite go home!" were also chanted.
They are expected to be met with more anti-monarchy protesters Sunday at Quebec City Hall. Canadian broadcaster CBC says local residents have protested the monarchy for decades, dating back to the Queen's visit to the province in 1964.
They were met with thousands of fans on Friday when they celebrated Canada Day in Ottawa.
Prince William and Middleton, are on their first official states trip since marrying on April 29.
Earlier Saturday, they planted a tree in Ottawa and met with Canadian war veterans.
They are heading to Los Angeles on Friday, July 8, where they will spend three days. One stop on their itinerary is an L.A. BAFTA event. Read the full list of attendees here.