Twenty8Twelve Clothing by Sienna MillerTwenty8Twelve, the brand designed by Hollywood actress Sienna Miller and sister Savannah will make their London Fashion Week debut next month and show their Autumn Winter 09 collection. The brand, which is backed by Pepe Jeans owner Carlos Ortega, has secured a prime-time slot. The line is provisionally scheduled to close the third day (February 22) after shows from Christopher Kane, Richard Nicoll and Danielle Scutt.

In a joint statement, Sienna, 27, and Savannah, 30, said: “Twenty8Twelve is now in its fifth season and we just felt it was ready to be taken to the next level.”

Sienna and Savannah were approached by retail entrepreneur Ortega in 2006, with the idea to develop a designer diffusion level brand. The pair opened their first west London store in August 2007 and recently opened another in the designer section of the new Westfield shopping centre.