The Prime Minister announced his third visit to India and praised the contribution made by Britain's Indian communities at a Diwali celebration at Neasden Temple this week.
Both Mr Cameron and wife Samantha attended the temple in north London to mark the festival of light.
While the PM donned his normal attire of a day suit, Samantha took to the spirit of the occasion in a rust-coloured sari trimmed with elaborate embroidery, which a Downing Street spokesperson confirmed she had borrowed from a friend.
The mother-of-three teamed her sari with a pair of nude-colour pumps, kept jewellery to a minimum, opting only for her wedding ring and a pair of gold earrings, and a poppy. The overall look was simply elegant.
During their visit to the temple, the Camerons were seen taking part in traditional Diwali rituals.
After spending several minutes inside the Mandir the couple entered the main prayer hall where they performed the Aarti lights ritual in front of the Annakut – the wall of food inside.
Speaking to over 2,000 people in the hall, and to another 2,000 via screens in the rest of the temple, the Prime Minister expressed his and Mrs Cameron's delight at "being here with you today."
At the celebrations the Prime Minister spoke of the British-Indian community’s role in strengthening the UK’s relationship with India.
Praising the British-Indian community he said: “I see what the British-Indian community has given to our country.
“The entrepreneurs who have enriched us, the artists who’ve inspired us, the sportsman who’ve entertained us, doctors who’ve helped us and, of course, the fantastic cooks who today have so admirably fed us. Your contribution throughout this country shines out.”
He spoke of his two wishes for the New Year – that the British Indian community “help strengthen our relationship with India” and “becomes ever more involved in shaping the life of our country.”
Closing his address the Prime Minister wished the audience a happy new year:
"From the bottom of my heart, I'd like to wish everyone here - and all Hindus throughout Britain - a very Happy Diwali and a prosperous new year. Jai Swami Narayan."
After a meeting with the temple's board of trustees the Prime Minister and Mrs Cameron bid their farewell and returned to Downing Street.