Sienna Miller sent 53 texts to fiancé Rhys Ifans in just 8 hours, NOW reports.

'Sienna is missing Rhys massively and they have stayed in constant contact,' says a source.

'She boasted that they sent each other 53 texts in the space of 8 hours. Everyone's been saying she must have had smoke coming out of her mobile.'

'We've also been telling her that if she doesn't calm down she'll end up with repetitive strain injury - and won't ever be able to text him again!' the source tells the Daily Mirror.

'Sienna's started trying to use alternate hands to give her thumbs a bit of a break.'