Justin Bieber, Ryan Reynolds, More Celebrate Canada Day

Getty Images
Justin Bieber (left), Ryan Reynolds

Seth Rogen, Nathan Fillion and Carrie Underwood also were among celebrities who took to social media to share in the Canadian spirit.

Justin Bieber, Seth Rogen and Carrie Underwood were among celebrities celebrating Canada Day on Friday.

"Happy Canada Day!" Canadian citizen Bieber wrote in a tweet, which accompanied a cartoon image of the singer holding a Canadian flag.

Fellow Canadian and Deadpool star Ryan Reynolds also paid tribute to his homeland: "Happy Birthday Canada. 149 years ago, North America wowed onlookers with her post baby body," he tweeted.

Nathan Fillion, Nina Dobrev and Tatiana Maslany also took part in the celebration on social media. See a roundup of celebrities' social media posts below.