Justin Timberlake's William Rast clothing label is branching into women's wear with a new line being launched for autumn 2008.

Also new for the season is a luxury men's wear collection, which extends the contemporary denim brand into a full lifestyle range.

The collections are being developed and designed in collaboration with Paris68, the New York based design consultancy set up by Johan and Marcella Lindeberg.

Johan Lindeberg, best known for his role as creative director of the Swedish brand J.Lindeberg, will design the men's collection while Marcella Lindeberg will design the women's collection.

"I am really excited that we have the chance to develop these strong collections together and that my vision for a complete William Rast lifestyle brand is in the hands of two of my most favourite designers," said Justin Timberlake, who founded William Rast with Trace Alaya in 2005.

The collections are set to launch in January of 2008.

CEO, Colin Dyne, said the new partnership "opens numerous avenues for William Rast and positions the company to grow across many categories."