The 28-year-old singer and 21-year-old model got close at a Cannes Film Festival after-party, according to TMZ.
The Los Angeles Times reported The Weeknd and Hadid attended the Magnum x Alexander Wang party on the Promenade de la Croisette. Hadid is the face of Magnum ice cream's new campaign.
Sources said The Weeknd and Hadid spent the night "huddled" in a VIP area. The pair were openly affectionate as they kissed intermittently, and were later seen leaving the party together.
The Weeknd and Hadid split in November 2016 after nearly two years of dating. The pair sparked reconciliation rumors at Coachella music festival in April following The Weeknd's split from Selena Gomez in the fall.