The heiress, 32, has been dating model River, 21, for eight months but sees it all moving to the altar.
River has called Paris his “future wife” and when I spoke to her in Cannes, she told me: “It could happen soon... I trust him with my life and that means the world to me more than anything.”
Well, almost anything, as my sources tell me Paris – worth an estimated £66million – and her lawyers would insist on a pre-nup in case the couple don’t live happily ever after.
Which, given Paris’s previous two engagements, seems a fair possibility.
Chatting at the De Grisogono party at the Eden Roc hotel, Paris told me she wants lots of mini-sproggs.