Camilla glowing at 70 in new portrait by photographer to the stars

Joanna Lumley and Kathy Lette

Joanna Lumley and Kathy Lette

The party was the second celebration of Camilla's birthday, which falls on Monday 17 July.

Shoulder to shoulder with her husband, the Duchess of Cornwall poses for an official portrait released to mark her 70th birthday tomorrow. Charles went on to marry Diana Spencer in 1981 but within a few years he had returned to Camilla, conducting an extra-marital affair, as Princess Diana also sought comfort from officer James Hewitt.

The photograph, taken in May, shows Charles and Camilla in the morning room of their London home, Clarence House.

Testino shot to worldwide stardom after taking a series of attractive pictures of Diana for the Vanity Fair July 1997 issue - a month before she died.

"I first photographed The Duchess after her wedding to The Prince on a commission from British Vogue in 2006, and discovered a kind and lovely person with a wonderful sense of humour. But behind closed doors she appears to have provided the heir to the throne with the love and a normal life, away from his public role, that he has always wanted", the newspaper said in a short biography written for Camilla's birthday.

She held a garden party for her staff and her many charities on Thursday at Clarence House in London.

Her step-sons Prince William and Prince Harry attended along with her own children Tom Parker Bowles and Laura Lopes.

Prince Charles and Camilla, Duchess of Cornwall, have unveiled their official portrait ahead of Camilla's 70th birthday on Monday.

It is exactly this strategy, creating bespoke, stylish pieces in an age of anonymous fast fashion trends, that has propelled Valentine's Marylebone atelier to reach a milestone 30 years in business, as well as attracting a loyal base of clients- one of the most notable being Camilla, Duchess of Cornwall.

Camilla was initially blamed by some for Diana's unhappiness as she complained publicly about Camilla's continuing close relationship with Charles.

Ms Seward said: The whole Diana situation has always been very hard for Camilla. "Look out of the window; can you see them?" But she also couldn't forgive the princess for deliberately saying things to "damage Charles".