Justin Trudeau's son praises 'kind and nice' Katy Perry Justin Trudeau's 18-year-old son Xavier has confirmed he has met his dad's "kind and nice" girlfriend Katy Perry. 25 February 2026 Justin Trudeau's son approves of his romance with Katy Perry. Justin Trudeau is dating Katy Perry The Roar hitmaker had been romantically linked with the former Canadian Prime Minister for several months before they made their relationship Instagram official in December and now 18-year-old Xavier Trudeau - the eldest child of the politician and his estranged wife Sophie - has praised the 41-year-old pop star.