It is not unusual for Trudeau to sport slicked-down hair and a blue suit with a bright red tie, but his wide-rimmed spectacles were the giveaway to assembled staff and journalists of the Halloween surprise the 45-year-old Canadian Prime Minister had in store.
When it comes to looking good, Justin Trudeau always delivers, especially on Halloween.
After descending the stairs on his way to question period, he reportedly said in both official languages of the country that it was a big shock to see the prime minister dressed as a journalist, but "you know, gotta do it".
And as he walked down the stairs into the House of Commons, he unbuttoned his shirt to reveal the signature Superman logo.
Trudeau is known for dressing up for Halloween with DC Comics inspired costumes.
The event marked the first time a foreign head of government or state has ever been invited to partake in the celebration.
Trudeau often dresses up for Halloween, a year ago dressing up as the pilot from the Little Prince, and in 2015 dressed as Han Solo from Star Wars.
Trudeau was later spotted wearing the costume while out trick-or-treating with his wife, Sophie, and their three children, Xavier, Ella-Grace and Hadrien, in Ottawa, Ontario, Canada. Ken McDonald, the LPC Member of Parliament from Avalon, Newfoundland; Bryan May, the MP for Cambridge; and Robert-Falcon Ouellette, the MP for Winnpeg Centre also celebrated the holiday with various costumes.