Kate Moss thinks Sienna Miller will break Rhys Ifans' heart

British supermodel Kate Moss has revealed her misgivings towards Sienna Miller and Rhys Ifans' reported relationship; and fears that the actress will break 39-year-old Ifans' heart.

Moss, who reportedly had a furious row with Miller at a wedding in September after she accused Sienna of stealing her style and friends - is said to have warned the Welsh actor, with whom is her close friend, that Sienna is bad news.

A close friend of the 'Factory Girl' actress told the Daily Express newspaper: "Kate isn't happy. Rhys was her main male friend in her close-knit group. She isn't keen on Sienna. There is definite tension between them.

"Sienna was fuming after Kate gave Rhys a talking to when she heard the relationship was getting serious. Kate doesn't think it will last and doesn't want Rhys getting hurt."

Despite Kate's fears, the pair - who have constantly denied they are a couple, despite being seen kissing in public - are said to be so in love they are even considering getting married.

The source added: "Sienna is probably the happiest I've ever seen her. She and Rhys are perfect together.

"They are having such a great time, I wouldn't be surprised if they got engaged."