Dallas Mavericks star Cooper Flagg officially confirmed his relationship with a fellow Blue Devils basketball star on social media.

Flagg made things 'Instagram official' with his girlfriend, Duke sophomore center Ari Robertson, on Thursday.

The couple shared photos and videos together on their respective social media accounts - including on TikTok where the two re-created an online trend with multiple videos from their vacation in Turks and Caicos.

Roberson, who created the TikTok video, posted it to her account with the caption, 'Carry on...' with a kissing face emoji.

Meanwhile, Flagg shared a snapshot of the pair kissing in a mirror along with two black heart emojis.

The two overlapped at Duke for one season - when Flagg took the Blue Devils to the Final Four where they lost a heartbreaker to Houston.

Roberson is the younger sister of former NBA star Andre Roberson, who is best known for his time with the Oklahoma City Thunder and last played with the Brooklyn Nets.

The couple first generated buzz when they attended Duke's dominant 101-64 victory over Syracuse at Cameron Indoor Stadium in February.

Flagg has plenty of reasons to be happy after his first season in the NBA ended with him winning the NBA Rookie of the Year award.

The 19-year-old became the second-youngest player in history to win the award behind LeBron James. 

As for Roberson, she starred for a Duke team that reached the Elite Eight. All along the way, she averaged 8.0 points, 5.7 rebounds and 1.3 blocks per game.