It is lucky that Sienna Miller is incapable of staying single for longer than a couple of days, as she narrowly avoided forming half of what could have been the most repellent celebrity couple in the world: Sienna Miller and James Blunt.

Blunt apparently showed interest in Sienna at a party in Ibiza but luckily for everyone involved, Sienna was with her new boyfriend, psy trance DJ George Barker aka Slinky Wizard.

Imagine the amount of hate the offspring of this couple could have generated with the genes of both Blunt and Miller. It hardly bears thinking about.

Sienna, George and James were at party in Ibiza for interior designer Kelly Hoppen which also featured David Walliams and Sir Philip Green.

A source told The Mirror: "Sienna and George are really quite besotted. They haven’t been dating for long but decided to just go for it and get away for a sunshine break. Sienna and her sister Natasha had organised a surprise 50th birthday for Kelly, and Si invited George along too so they could meet informally over a glass of bubbly or three.

"Poor George didn’t know what had hit him when he walked into the grounds of the villa. It really was quite a party. Pete Tong was DJing and at one stage Philip Green started swinging his hips wildly. He had everyone in stitches."

Philip Green, Topshop, clothes, stitches - there's a joke trying to get out there.

The source added: "James Blunt didn’t realise Sienna was spoken for and seemed keen on getting to know her better – until George got wind of it, and swooped in to rescue her.

And rescue the world from the most irritating celebrity coupling since Johnny Borrell and Kirsten Dunst...

Above are some pics of James Blunt at a beach party in Ibiza last month.