(Cover) - EN Showbiz - Sienna Miller’s fashion designer sister “doubts” she will be asked to make the star’s wedding dress.

Sienna, 28, is believed to be planning to wed Jude Law in the next few months, after the Hollywood stars rekindled their romance last October. They were previously engaged, but their relationship ended when Jude admitted to sleeping with his children’s nanny in 2005.

There have been repeated rumours the pair are planning to wed soon in a secret “bohemian-style” ceremony in Britain after Sienna was reportedly seen wearing her old engagement ring.

Savannah runs a successful fashion label, Twenty8Twelve, with Sienna, and even though a host of stars are often seen wearing her creations, Savannah doesn’t think her younger sister will ask her to design a wedding gown.

"There will be a lot of competition from the likes of Galliano and other designers, so I doubt I'll be making her dress," the 31-year-old told British newspaper The Daily Telegraph.

Although Savannah was initially unhappy Sienna had reunited with 37-year-old Jude, she insists they are good friends now. Savannah, Jude and Sienna recently went to Italy with Jude’s children and the holiday allowed them to form a close bond again.

"We spent two weeks in Puglia in southern Italy and swam, cooked and chilled out together," Savannah explained. "I hardly ever go away but that holiday made me realise that family and your loved ones are what's important." (C) Cover Media