Justin Trudeau sworn in as Canada's new prime minister
Justin Trudeau has been sworn in as Canada's prime minister, following in the footsteps of his charismatic father.
The 43-year-old Mr Trudeau, a former school teacher and member of parliament since 2008, is the second youngest prime minister in Canadian history.
He is the son of late prime minister Pierre Trudeau, who swept to office in 1968 on a wave of support dubbed "Trudeaumania".
He was prime minister until 1984 with a short interruption and remains one of the few Canadian politicians known in America, his charisma often drawing comparisons to John F Kennedy.
Mr Trudeau mouthed "I love you" to his young family and his mother after being sworn in.
The new prime minister now has the chance to restore his father's Liberal legacy, which has been under siege during 10 years of Conservative rule under Stephen Harper.
His election signals a generational change that will also be reflected in his cabinet.
His ministers will be announced and most of them will be between the ages of 35 and 50. They are scheduled to hold their first meeting in the afternoon and then face the media, in a departure from the Harper era.
Mr Harper stepped down as prime minister just ahead of the swearing-in ceremony.
Mr Trudeau, his wife and his new cabinet arrived at Rideau Hall on a bus for the swearing-in ceremony.
They waved to a large crowd as they walked up the grounds to the hall. One of Mr Trudeau's young kids jumped into his arms upon seeing his father arrive.
Mr Trudeau's victory should improve Canada's ties with the United States.
Mr Harper was angered by US president Barack Obama's reluctance to approve the Keystone XL pipeline from Alberta to Texas and it damaged relations.
Although Mr Trudeau supports the pipeline, he argues relations should not hinge on the project.
Mr Harper, one of the longest-serving Western leaders, fought hard to reverse the image of a Liberal Canada, cutting corporate and sales taxes and removing Canada from a climate change agreement.
Mr Trudeau tapped into an appetite for change with a plan to reject austerity and spend billions on infrastructure, running deficits for three years to do so.