William and Kate pictured laying in the grass with their children as they mark new family chapter, 15 years after the royal wedding

The Prince and Princess of Wales and their three children have been pictured in a new family photo, shared on the couple's 15th wedding anniversary.

It was taken during the family's Easter holiday in Cornwall earlier this month and shows Prince William and Catherine, along with Prince George, Princess Charlotte and Prince Louis laying together on the grass in the sunshine.

Many observers are calling this period a new chapter for the Wales family, after enduring a tough few years which included Kate's cancer diagnosis and recovery, King Charles' cancer diagnosis, the death of William's grandmother Queen Elizabeth II, and the royal exile of two key family members.

The relaxed portrait was posted on Wednesday, April 29, along with a heart emoji and a message which read: "Celebrating 15 years of marriage".

It also shows two of the couple's dogs – their 10-month-old puppy, whose name has not yet been revealed and its mother, Orla.

The image was taken by Matt Porteous, one of the prince and princess's favoured photographers.

The same photographer also took the photo of Prince Louis released on May 23 to mark his eighth birthday this month.

READ MORE: William and Kate's bond as they celebrate milestone

READ MORE: Why Aussie tour may derail Harry's plan to reconcile

READ MORE: Melania Trump, Queen Camilla match in pink

Porteous also filmed a short video of Louis running along the beach in Cornwall and playing cricket for the occasion.

Prince William and Kate celebrated their wedding anniversary by carrying out an official engagement in south London, visiting an education charity which benefitted from the couple's Royal Wedding Gift Fund in 2011.

IntoUniversity, a charity which aims to help young people facing disadvantage achieve their full potential, was chosen as one of the 26 charities to benefit from the fund.

The fund was created to give members of the public who wished to give William and Kate a wedding gift somewhere to donate money instead.

It ultimately raised more than $2 million, distributed among 26 charities chosen by the couple.

During their visit on Wednesday, Prince William and Kate met with Year 5 students from Victory Primary School who were taking part in one of the charity's free educational workshops.

At the time of the royal wedding, the charity operated in just six centres but it has now grown to 46, supporting more than 60,000 young people each year by building confidence and opening up pathways to future study and careers.

Kate was seen wearing her Daniella Draper necklace featuring the initials of her three children.

After the visit, the prince and princess had lunch at The Goring, the London hotel where the former Kate Middleton stayed the night before their wedding.

Prince William and Kate married inside Westminster Abbey in front of 1,900 guests.

After the ceremony, the newlyweds rode in a carriage procession through London before appearing on the balcony at Buckingham Palace to wave to the crowds.

Their first child, Prince George, was born in 2013 and later followed by Princess Charlotte in 2015. Prince Louis was born in 2018.

The Wales family moved into their permanent home, Forest Lodge, in Windsor late last year.

FOLLOW US ON WHATSAPP HERE: Stay across all the latest in celebrity, lifestyle and opinion via our WhatsApp channel. No comments, no algorithm and nobody can see your private details.