A season celebrating the best of Indian culture kicks off with three weeks of free outdoor events.
The festival promises to be spectacular
Trafalgar Square will host dance, music and theatre performances, including a spectacular musical homage to Bollywood and its famous poster art.
The events are part of India Now, a three-month celebration of culture from the subcontinent throughout London.
"The Trafalgar Square Festival... guarantees to be nothing short of spectacular," said the mayor of London.
Events will be held at the square between Thursday and Sunday during the next three weeks, starting at 1800 BST on 2 August.
India Now highlights include the London Mela, a popular community festival, in Gunnersbury Park, west London, on 12 August.
Somerset House's open air cinema in central London will premiere Bollywood star Shah Rukh Khan's latest release, Chak De India, on 9 August.
The Royal Albert Hall plays host to award-winning musician Nitin Sawhney for an evening of 21st Century orchestral fusion on 10 August.
Regent Street will be the setting for a colourful street festival, including dancers and food stalls on 2 September.