But the Joe Le Taxi singer is refusing to comment on the stories.
There was no sign of her other half as she turned up solo at the premiere of her new film Café de Flore.
Though if she was feeling the strain she wasn't showing it, smiling seductively on the red carpet.
The 39-year-old recently told a radio interviewer that she is used to being the centre of rumours and gossip, and doesn't feel the need to discuss her private life.
"You know, if I eat three peas, I'm pregnant. If I visit a city, I'm going to buy a house there. In the winter I split up, in the summer I get married. For the last 15 years they've been saying I've got married," said the actress.
"If on top of that I have to respond to all the rumours…"
Vanessa and her partner of 14 years, Johnny are said to be living separate lives. She is apparently based in Los Angeles where Lily, 11, and Jack, nine, attend private school, while their father travels the world for his movies.
The 50-year-old actor attended the Golden Globes alone, and Vanessa was last seen in public turning on the Paris Christmas lights with Karl Lagerfeld before her premiere outing.