Justin Trudeau acknowledged his blooming relationship with Katy Perry via his Halloween costume on Friday.

The former Canadian Prime Minister, 53, was seen in an Instagram post dressed as a shark while his son Hadrien, 11, was a wounded surfer after getting bitten by said shark.

'Ready for Halloween with Hadrien: he’s the surfer, I’m the shark (to his left),' said Trudeau, who served as Canada's prime minister from 2015 to 2025. 

He added, 'We built the costume together - a little father-son Halloween teamwork.'

The costume was a clear reference to Perry's fame Super Bowl halftime outing in 2015, as the 41-year-old singer's backup dancers became a popular meme in their shark outfits.

The politician and the Roar artist were first seen in late July dining at the Montreal restaurant Le Violon. 

The Firework singer and fiancé Orlando Bloom announced they were splitting earlier this year. They are parents to daughter Daisy, five.

Trudeau and his ex-wife Sophie Grégoire split in 2023; they are also parents to daughter Ella-Grace Margaret Trudeau, 16.

'Justin has had a lot of upheavals in the past couple of years, both in his professional-political status and at home with the split from Sophie,' an insider told People earlier this week. 

The source said the politician 'is a much happier person now' with things sorted out for the better. 

'Stresses are greatly diminished,' the insider said. 'And he is intrigued with Katy. They have fun together, laugh a lot, talk about everything.'

'His life is much improved, and his relationship with Katy has had a lot to do with it.'

An insider in Canadian politics told People that Perry and Trudeau are 'very much a couple' and 'have been seeing each other as often as possible.'

'Obviously, she’s busy, but so is he. Yet he goes the extra mile to be with her when possible. Especially when it’s important.'

The Ottawa, Canada native showed support for the Toronto Blue Jays in a subsequent post, as they head to a decisive Game 7 in the World Series against the Los Angeles Dodgers. (Perry, a Santa Barbara native, has past been pictured wearing Dodger caps.)

Friday's Game 6 in Toronto saw the Dodgers stay alive with a 3-1 win off the stellar pitching of Yoshinobu Yamamoto, who has been dominant with a 4-1 record this postseason.

Hall of Fame-bound veteran Max Scherzer is slated to start for the Jays in Saturday's game seven, while it was not immediate clear who would pitch for the Dodgers, with superstar Shohei Ohtani named as a potential option. 

Saturday will mark the 10th time the World Series has ended in November.