The pair, who broke up in November 2016 after more than one year of dating, were spotted in Paris - yes, the city of love - on a lunch date, before strolling the streets together arm in arm.
Though they are yet to publically comment on their reconciliation, Hadid and Tesfaye have come about as close to it as any millennial couple does at the start of a budding relationship: posting Instagrams directed at one another, without going as far as to include a full-blown couple pic (as we all know, that part comes later).
First, Bella posted a photo with roses in her mouth the same evening as Tesfaye was spotted carrying the very roses while walking down the street in Paris.
The Weeknd also posted an Insta Story featuring the same bottle of tomato sauce Hadid puts on her head in the second photo above, so you know they were at dinner together.
The Starboy singer then went one step further, posting a Story of Hadid holding a sugar packet labelled 'Sugar Daddy.'
While you can't see the model's face, those nails - and the fact that they've been inseparable in the past few days - are pretty telling.