Two of Hollywood's hottest stars have been confirmed as the new 'faces' of two major denim brands. WWD reports that Kate Bosworth will front the Calvin Klein Jeans S/S '08 campaign, which will come as no big surprise to fashion watchers who saw the actress perched on the front row at the CK spring show in New York last September. Shot by David Sims, this marks her first global campaign, which sees the brand return to its clean, All-American look from its last more edgy campaign featuring Jamie Burke.

>>> Meanwhile, Ashton Kutcher has been tapped by Pepe Jeans London to front their campaign for the next two seasons. Taking over the reigns from Sienna Miller, the star of Punk'd is joined by model Daria Werbowy in the ads that were also shot by Sims.

Look out for the new Pepe ads in the March issues of new adverts will appear in GQ, Vogue and Arena Homme Plus.