But the singer, 39, wasn't looking to reignite her relationship with the actor, 42.
She was in France to visit Olivier's pet dog, Sheba.
The mutt kept Kylie company while she was recovering from breast cancer treatment and they became close.
Meanwhile, the Aussie star says Britney Spears needs rescuing.
'Whatever help she needs, she should reach out and get it,' Kylie tells The Sun.
'I wish someone would write a manual about fame because it's not easy.
'It's not to the same extreme, but I can remember having a mini-meltdown myself - and unless you've got good people around to support you, you've got a problem.'
Get more celeb news from Now Magazine