From L-R: Karlie wears dress, £50, sequin hat, £18, coat, £115 and vest, £10. Jourdan wears hat, £20, jacket, £150, camisole, £25 and trousers, £50. All from Topshop.

Looky here! Fashion's favourite girl-of-the-moment, Jourdan Dunn, appears to have nabbed her biggest ad campaign to date. The 19-year-old stars in Topshop's autumn/winter 2008-9 ads alongside Karlie Kloss (pictured above, left), and Canadian models Kori Richardson and Amanda Laine.

Click on to see more pics from the campaign...

Jourdan wears jacket, £100, dress, £45, and belt, £30. All from Topshop.

Jourdan wears shirt, £25, and trousers, £95. All from Topshop.

Jourdan wears hat, £20, camisole, £28, trousers, £50
and jacket, £60. All from Topshop.

Shot on board buses and Tube trains across London, the campaign theme 'Topshop on the go' rings true for the retailer's first standalone store in New York, slated to open this October.

"We wanted the campaign to have a very London vibe, sticking to Topshop's roots. And Topshop girls are movers and shakers - super-stylish, cool girls," revealed Topshop creative director, Ronnie Cooke-Newhouse.

Will Jourdan follow in the footsteps of other Topshop successes such as Lily Donaldson, Lily Cole, and Caroline Trentini? Stay tuned...