Rumours the pair are dating have been circulating for a while but now it seems it may actually be true as an insider tells Look magazine: "They have great chemistry." Shock. Horror.
"Sure, they've always agreed to keep things super-casual and private because of their crazy world, but Harry genuinely likes Cara a lot - he has done ever since they met three years ago.
"They've actually had an on/off thing going all this time when they're in the same city, but they've never had the chance to give a real relationship a shot. I can't imagine why she wants to join the list of women who have been Harry'd."
They went on to say: "Of course he might profess his love for her - and he has done that on many occasions - but she's heard it all before. He said that to her just a month before he went public with Taylor, so I imagine she's learned her lesson."
So, what d'you reckon?