Millie Mackintosh, Frankie Dettori, Denise Lewis, Laura Whitmore and Michel Roux Jnr have been announced as The Investec Derby Festival 2015 ambassadors, and feature in the campaign to help launch this year's event, taking place June 5 and 6.

Mackintosh commented 'Racing is one of those rare opportunities to combine glamorous outfits with statement hats. I paired a Hobbs dress and Philip Treacy hat during the shoot which I loved. The Derby is the pinnacle of the summer season and I'm looking forward to enjoying a spectacular day out'.