Justin Pierre James Trudeau[c] (born December 25, 1971) is a Canadian politician who served as the 23rd prime minister of Canada from 2015 to 2025. He led the Liberal Party from 2013 until his resignation in 2025 and was the member of Parliament (MP) for Papineau from 2008 until 2025. Trudeau was the second-youngest prime minister in Canadian history after Joe Clark; he was also the first to be the child or other relative of a previous holder of the post, as the eldest son of Pierre Trudeau.

Born in Ottawa, Trudeau attended Collège Jean-de-Brébeuf, graduated from McGill University in 1994 with a Bachelor of Arts degree in literature, then in 1998 acquired a Bachelor of Education degree from the University of British Columbia. After graduating he taught French, humanities, math and drama at the secondary school level in Vancouver. Initially relocating back to Montreal in 2002 to further his studies; advocacy work related to youth and environmental issues would be his primary focus serving as chair for the youth charity Katimavik and as director of the not-for-profit Canadian Avalanche Association. In 2006, he was appointed as chair of the Liberal Party's Task Force on Youth Renewal.