Aishwarya Rai Bachchan at the Royal Ascot horse race meeting in England. (Reuters)

Bollywood actress and former Miss World Aishwarya Rai Bachchan looked stunning in a black and white lace dress on day one of the Royal Ascot horse race meeting in Berkshire, west of London.

The gorgeous actress has been a regular at the race meeting since 2009, representing watch brand Longines for which she is the brand "Ambassador of Elegance" over the last 10 years. Longines is said to be the official timekeeper of Royal Ascot.

Aishwarya, who has shed oodles of post-baby weight, looked dashing in her dress and wore a pretty black and white floral hat.

Aishwarya Rai (Reuters)