Justin Trudeau has been sworn in as Canada’s prime minister, ending 10 years of Conservative rule.
His ascension marks a new era of Liberal politics after an election that saw Stephen Harper’s party ousted.
Justin Trudeau, 43, follows in the footsteps of his father who held the office for nearly two decades.
The move could see an increase in public spending, better relations with the US and an increase in the number of Syrian refugees being taken in.
The new ministers, who are mostly aged between 35 and 50, took their oaths in the bilingual ceremony.
Justin Trudeau whispered “I love you” to his family upon being sworn in.
The former school teacher turned politician was elected to parliament in 2008, and becomes the second youngest prime minister in Canadian history.
Justin Trudeau was elected after running on a plan to reject austerity and spend billions on infrastructure projects that would see Canada run a deficit for three years.
The plan caught the attention of a Canadian electorate hungry for change after a decade under the rule of PM Stephen Harper.
Stephen Harper’s political platform included plans that saw corporate and sales tax rates cut as well as Canada’s removal from a climate change agreement.
The conservative prime minister was also angered by Barack Obama’s reluctance to approve the Keystone XL pipeline that was designed to
petroleum from Alberta to Texas.
For his part, Justin Trudeau believes the pipeline should be approved, but does not think that that the disagreement should weigh so heavily on US-Canada relations.
Justin Trudeau’s Liberal Party has decisively won Canada’s general election, ending nearly a decade of Conservative rule.
The centrist Liberals started the campaign in third place but in a stunning turnaround now command a majority.
Justin Trudeau, the 43-year-old son of late PM Pierre Trudeau, said Canadians had voted for real change.
Incumbent Conservative PM Stephen Harper accepted defeat and his party said he will step down as leader.
It was the longest campaign in Canada’s history, and had been thought to be much closer.
Speaking after the polls closed, Stephen Harper said he had already congratulated Justin Trudeau, saying the Conservatives would accept the results “without hesitation”.
Addressing his jubilant supporters shortly afterwards, Justin Trudeau said that Canadians “sent a clear message tonight – it’s time for a change”.
“We beat fear with hope, we beat cynicism with hard work. Most of all we defeated the idea that Canadians should be satisfied with less.
“This is what positive politics can do,” he said.
Justin Trudeau also praised Stephen Harper for his service to Canada.
Few had predicted a Liberal victory on this scale. They look set to win 184 seats, a huge increase from only 36 that they held after suffering their worst-ever election result in 2011.
Liberals become the first party ever to move from third place in parliament to a majority in one election.
Meanwhile, the left-leaning New Democratic Party (NDP) is on course to win 44 seats, less than half the number they held in the outgoing parliament.
“I congratulated Mr. Trudeau on his exceptional achievement,” said NDP leader Tom Mulcair.
Early counts in the eastern provinces gave the Liberals their first taste of victory, as they led in all 32 races there.
The Conservatives are now in danger of losing all 13 seats they held in Atlantic Canada in 2011.
Justin Trudeau campaigned on a promise of change, urging voters ahead of the polling day to “come together as a country”.
His charismatic father, Pierre Trudeau, is considered the father of modern Canada.
Stephen Harper, 56, portrayed himself as the steady hand who could steer Canada’s troubled economy back on track.
His campaign ran TV advertisements saying that Justin Trudeau was “just not ready” to take office.