Ella-Grace, 16, introduced her father at the Liberal Party leadership event on Sunday, and said she is "so proud" of her dad.
The new Liberal Party leader will have a colossal task at the top of his to-do list: defend Canada from Donald Trump.
The rise and fall of Justin Trudeau – with Mark Carney to become Canada’s next prime minister - The leader was once a poster boy for liberalism but will be replaced after nearly 10 years in office