London, Jan 06 : Hollywood actress Sienna Miller is to make her debut at London Fashion Week next month with a collection co-designed with her older sister Savannah.

The `Factory Girl' actress, who is known for her style, is excited about the project.

"We are so excited. We felt ready to be taken to the next level," The Sun quoted designer sisters, as saying.

They have aptly named the designer label `Twenty8Twelve', which gets its name from Sienna's birthday December 28th.

Savannah graduated in 2004 from Central Saint Martins with a first class honours degree in fashion design with knitwear. She has worked for Alexander McQueen, Matthew Williamson, Anya Hindmarch and Betty Jackson. (ANI)