While the rest of their weekend plans remain tight-lip for now, DNCE was scheduled to perform in New York City's Times Square as part of Dick Clark's New Year's Rockin Eve.
Romance rumors between Joe and Sophie first sparked back in November when the pair was spotted getting cozy at a Kings Of Leon concert in the Netherlands.
Since then, the couple has stepped out in several cities together including Mammoth, Calif., over Thanksgiving weekend.
"He thinks she's a cool girl," a source previously told People. "She's always been into him, but he's starting to like her more and more."
Looking ahead into 2017, Joe and DNCE will hit the road for several performances across the United States in January and February. As for Sophie, she will return to Game of Thrones in the role of Sansa Stark.