Justin Theroux Wears a Britney Spears Shirt While Doing Push-Up Challenge!

Justin Theroux puts his toned arms on display while wearing a Britney Spears tee and doing the push-up challenge!

The 48-year-old actor tried to do push-ups, but his dog Kuma just wanted to cuddle up and give him kisses the entire time.

“Great workout. Thanks Kumz,” Justin said in the video, posted to his Instagram Stories.

Justin made a surprise appearance on Saturday Night Live a few weeks ago to help one of the show’s stars get buff. Make sure to watch the funny sketch!

Make sure to see how hot Justin looked when he wore the shirt during a bike ride in 2019.

10+ pictures inside of Justin Theroux doing his push-ups…