Samantha Cameron glitters in a spectacular Diwali sari

Samantha Cameron takes part in a ceremony at the Hindu temple Shri Swaminarayan Mandir in London. (AFP)

Samantha Cameron, wife of British Prime Minister David Cameron, greets a group of young women during a visit to the Hindu temple Shri Swaminarayan Mandir in London. (REUTERS)

Britain's Prime Minister David Cameron takes part in a ceremony to mark Diwali at the Hindu temple Shri Swaminarayan Mandir in London. (REUTERS)

Britain's Prime Minister David Cameron takes part in a ceremony to mark Diwali at the Hindu temple Shri Swaminarayan Mandir in London. (REUTERS)

British Prime Minister David Cameron looks up as he stands with his wife Samantha Cameron during a visit to the Hindu temple Shri Swaminarayan Mandir in London. (REUTERS)

Prime Minister David Cameron is adorned with a "tika", a mark on the forehead, upon arrival during Diwali. (REUTERS)

Samantha Cameron (R), wife of British Prime Minister David Cameron, walks with Rena Amin, a leading women's volunteer, during Diwali. (REUTERS)

Britain's Prime Minister David Cameron and his wife Samantha pose for a photograph as they pour water on a Hindu deity as they arrive for a visit to the Hindu temple the Shri Swaminarayan Mandir, during Diwali, in London. (REUTERS)

Prime Minister David Cameron speaks during a ceremony at the Hindu temple Shri Swaminarayan Mandir in London. (AFP)