Kate Middleton and Prince William
has sat for her first glamorous shoot – with the famed photographer who took iconic pictures of Princess Diana.
Mario Testino – a fashion photographer who is well known for his pictures of celebrities and royalty, including Prince William
, Prince Harry and, of course, their mother – was behind the lens to shoot Middleton and her fiancé for their first official photo.
A spokeswoman at William's office confirmed to PEOPLE on Sunday that Testino has taken "some engagement photographs."
It's believed the shoot took place last month, after the couple's Nov. 16 engagement announcement
, and that the images will be released for publication in the near future.
"William is a very photogenic person ... self-confident, relaxed, impressive – and so much like his mother," Testino said recently. "I think it comes from a sense of security."
Testino is known for his memorable and candid pictures of Princess Diana taken for Vanity Fair
in 1997 and exhibited at Kensington Palace in 2005.
Of the shoot, Testino has said: "[Diana] said to me at the time [that] her children had said to her it was the most 'her' they had seen."
Testino also shot photos of William for British and American Vogue