Dallas Mavericks forward Cooper Flagg, 19, and Duke Blue Devils women’s basketball player Arianna Roberson, 20, have publicly confirmed their relationship after weeks of fan speculation, sharing intimate social media content that spread rapidly across multiple platforms on Friday, May 15, 2026.
Flagg posted an Instagram Story to his 1.8 million followers featuring the couple sharing a kiss in a stylish indoor setting. Roberson, who has 14,400 followers, reposted the same story to her own account. In the image, the 6’9″ Flagg leans in toward the 6’4″ Roberson as she holds the camera for a mirror selfie, both dressed in casual black outfits during what appears to be a vacation.
A subsequent TikTok video montage depicting the couple dancing, holding hands, and posing in coordinated outfits across scenic locations — including beaches and luxury interiors — went viral, accumulating millions of views after being shared widely on X (formerly Twitter).
The public confirmation follows a period of mounting speculation. According to reports, the pair first drew significant attention after posting matching photos from a luxury getaway in Turks and Caicos, including moments at Noah’s Ark Beach Club featuring playful scenes on swings over the ocean. The Caribbean trip occurred during the NBA offseason and intensified public interest in a relationship that sources suggest first gained traction in early 2026.
Dating rumours initially surfaced following courtside appearances the two made together at Duke games, as well as Roberson’s attendance at Flagg’s NBA Rookie of the Year press conference — an event that underscored just how significant Flagg’s debut season had been.
Flagg was selected as the No. 1 overall pick in the 2025 NBA Draft and went on to claim the 2025-26 NBA Rookie of the Year award after averaging 21.0 points, 6.7 rebounds, and 4.5 assists per game for the Mavericks. Among the highlights of his debut campaign was a historic 51-point individual performance. At just 19, Flagg has quickly established himself as one of the most watched players in the league.
Roberson, 20, is the younger sister of former NBA player Andre Roberson and continues her collegiate career with the Duke Blue Devils women’s basketball programme. Her own basketball profile has grown considerably in recent months, partly fuelled by her association with Flagg but also by her standing within the Duke programme.
The relationship places two high-profile basketball figures firmly in the public eye heading into the offseason, with Flagg expected to build on his record-breaking rookie campaign when the Mavericks return to action next season.
