Game of Thrones star shared two photos of the Cake By The Ocean singer as he posed in their living room, which decorated with streamers and a colorful 'Happy Birthday' banner. 'Birthday boy,' Sophie wrote in the caption, adding a partying smiley face emoji.
Joe donned a striped cream-colored polo shirt with navy blue trim and gold buttons as he stood with his arms behind his back.
In the next shot, Jonas rested his hand on a column and put his other hand in the pocket of his high-waisted grey pants as he glanced to the side with a slight smile.
A metallic tinsel foil fringe curtain was hung in the doorway behind the Camp Rock actor. Joe commented on Sophie's post with a red heart emoji.
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