Leading the way is Kelly Brook who arrived this morning among other extravagantly-dressed revellers.
The model, 38, went for an eye-catching, off-the-shoulder dress in bright pink.
And she paid tribute to the 1966 England World Cup team with a model of legendary player Bobby Moore.
She was joined at the track by a host of elegant race-goers as colour took over the enclosures at the Berkshire race course.
Floral prints, bright stripes and bold colours were the odds on favourite when it came to trackside style.