Queen Camilla, Princess Anne and Sarah Ferguson all don traditional spring shade

Leading members of the royal family put on a show of sartorial solidarity today - by donning shades of traditional Easter green. 

Many of the senior royals appeared to co-ordinate their looks at the traditional service, with Queen Camilla, Princess Anne and Sarah Ferguson all looking elegant in green.

Camilla grinned broadly at well-wishers gathered as she arrived by the monarch's side at St George's Chapel, Windsor this morning. 

The Queen, 76, looked elegant in a racing green dress with coordinating hat, matched with black suede knee high boots and a black clutch bag. 

Meanwhile, the Princess Royal also opted for the traditional shade, which is said to symbolise 'new beginnings', wearing a herringbone coat with a matching pillbox hat with feather adornment.

A Queen in green! Camilla looked elegant in a racing green  dress with co-ordinating hat, matched with black suede knee high boots and a black clutch bag

The Queen was wearing a green cost dress by Anna Valentine and a hat by Philip Treacey with an emerald and diamond brooch belonging to Queen Elizabeth

Meanwhile, the Princess Royal also opted for the traditional shade, which is said to symbolise 'new beginnings', wearing a herringbone coat with a matching pillbox hat with feather adornment

And Sarah Ferguson, the Duchess of York, opted for a bolder shade of the spring colour, wearing a boucle dress with a pair of black heels

The Duchess of York accessorised the look with a pair of black gloves, a black floral headband and gold jewellery

Meanwhile, the Duchess of Edinburgh looked stylish in purple as she arrived at Windsor Castle for the annual Easter Sunday service.

Sophie, 59, looked in high spirits as she greeted members of the clergy alongside her husband, Edward, Duke of Edinburgh. 

The royal opted for a vibrant violet tailored blazer jacket, which showed off her sophisticated slender figure.

The stand-out piece featured bright gold buttons, adding a touch of elegance to her ensemble. 

The mother-of-two paired this with an amethyst crocodile print clutch bag and a stylish white beret, which she placed on the side of her head. 

Sophie was all smiles as she arrived at the Castle alongside her sister-in-law Princess Anne and Fergie

Sophie wore her blonde tresses down and chose to wear glistening natural makeup today

Last year, the monarch led his family on foot to St George's Chapel in Windsor, where he was joined by William, Kate and their three children.

Charles will sit with Queen Camilla but apart from other Royals to shield him from infection during his treatment. 

It comes a week after the monarch's daughter-in-law Kate revealed she had been diagnosed with cancer and was undergoing preventative chemotherapy.

William and Kate will not attend the service, which is unlikely to be a large family gathering or service while Charles has paused public-facing royal duties.

The Prince and Princess of Wales and their children George, Charlotte and Louis are not at the event. Instead, the family are spending the holidays together after Kate's cancer diagnosis. 

The mother-of-two paired this with an amethyst crocodile print clutch bag and a stylish white beret, which she placed on the side of her head

The royal opted for a vibrant violet tailored blazer jacket, which showed off her sophisticated slender figure

The couple will instead be spending their children's Easter holidays at Amner Hall - their country home - where they can 'will close off from the world and move on'. 

Prince Andrew led the procession of the remaining royals as they arrived at the chapel for the ceremony today. 

Meanwhile, the King was seen smiling and waving at well-wishers as he arrived in his maroon state Bentley limousine for the service being held at St George's Chapel. 

 The 75-year-old was in high-spirits this morning as he made a 'gentle' return to public life in his most significant appearance since being diagnosed with cancer. 

The King and Queen wave as they arrive at St George's Chapel in Windsor 

King Charles and Queen Camilla arrive to attend the Easter Matins Service at St. George's Chapel, Windsor Castle

The King's cheery appearance will provide great reassurance to the public today after the monarch took a step back from his official duties following his diagnosis last month. 

The King has been receiving treatment for an undisclosed form of cancer since early February after he had an operation for an enlarged prostate at the London Clinic.

Despite the boost to public morale, however, the Royal Family's Easter service looks markedly different to previous years.

Last year, during his first Easter Service as King, Charles led the Firm - including William, Kate and their children - on foot into the service, while this year he arrived by car to shield him from infection during his treatment - as per doctor's orders. 

In the absence of Prince William, the Royal Family were instead led into the chapel by Prince Andrew and his ex-wife Sarah, the Duchess of York

The 75-year-old was in high-spirits this morning, smiling and waving at well-wishers as he arrived in his maroon state Bentley limousine for the service being held at St George's Chapel

King Charles and Queen Camilla arrive for Easter Service at Windsor as the monarch makes a 'gentle' return to public life

William is due to return to public duties after his children return to school following the Easter break.

In an emotional video, just over a week ago, the Princess asked for privacy as she revealed she would be undergoing preventative chemotherapy. Shortly after, Kensington Palace confirmed that the Waleses would not be attending church on Easter Sunday. 

Following Kate's emotional video last Friday, the King said he was 'so proud' of the princess for her courage in speaking out, and is said to be in 'the closest contact with his beloved daughter-in-law'. 

For now, he will continue to balance supporting his wife and family, and maintaining his official duties as he has done since her operation in January. 

Queen Camilla stood in for the King at the ancient Royal Maundy ceremony in Worcester earlier this week, marking the first time a consort has performed the duty on behalf of the monarch.