Pippa Middleton opts for chic £450 tweed suit from Salvoni as she turns out to support her sister Kate at Westminster Abbey carol concert

Pippa Middleton looked chic alongside her husband James as they arrived at Kate's Christmas carol concert at Westminster Abbey this evening.

The younger sister of Princess of Wales' looked festive in a colorful £450 Saloni tweed suit, which was trimmed and belted with luxurious velvet, as she stepped out to attend the Together At Christmas service on Friday evening.

The mother-of-two, 40, wrapped up warm donning a black polo neck jumper under her blazer. 

She completed her ensemble with suede heels and a matching designer clutch bag. 

The beauty opted for a sleek straight hairstyle and she added even more glamour with diamond drop earrings. 

James Matthews looked sharp in a navy blue suite which he paired with a white shirt and pink tie. 

The service will recognise the selfless efforts of communities throughout the UK, highlighting the importance of coming together to support one another.

Spearheaded by Kate, it will combine both traditional and modern elements, reaching people of all faiths and none.

The service, Royal Carols: Together at Christmas, will then be shown on ITV on Christmas Eve.

The service will see the world-renowned Westminster Abbey choir perform some of the nation’s most beloved carols, alongside musical performances by guests including Jacob Collier, Freya Ridings and James Bay, and a special duet from Beverley Knight and Adam Lambert.

Poignant readings will be delivered by speakers including Prince William, Micheal Ward, Emma Willis, Roman Kemp, and Jim Broadbent.

The theme this year is Kate's 'early years' campaign, designed to highlight how important what happens to children between the ages of birth to five is in shaping their development as adults.

Among the 1,500 invited guests tonight will be parents, carers, early educators, midwives, health visitors and community volunteers.

All have either been nominated by Lord-Lieutenants across the nation or charities associated with the Royal Family, as well as people the princess knows personally through her work in the field with her Royal Foundation for Early Childhood Centre.

Some families with young children who have had a particularly challenging year have also been invited too after being nominated by charities the princess has associations with.

The service, combining traditional and modern elements, will see the Westminster Abbey choir perform alongside musicians including singers Freya Ridings and James Bey, with a special duet from Beverley Knight and Adam Lambert of The Christmas Song, made famous by Nat King Cole.

Readings will be delivered by Prince William, actor Jim Broadbent, presenter Emma Willis and actor Michael Ward.

Presenter Roman Kemp will introduce the special rendition of Last Christmas on Lennon's piano, talking about the role George Michael played in his own life – his mother, Shirlie Kemp, was one of his backing singers - and the story of the piano itself.

A source told the Mail that the instrument had been loaned by his estate who were keen to support this year's service. 

Tonight's service will be attended by the princess' family, friends and other members of the Royal Family.

Although he will not be present due to a diary clash, the King has donated Christmas trees from Windsor Great Park to decorate Westminster Abbey, which will be donated to the local community after the service.

The abbey will also be filled with sustainable, eco-friendly festive decorations.

Outside the princess has had a special post box installed, with guests encouraged to bring a card which will be distributed to children who might be struggling this year through charities including Child Bereavement UK, East Anglia Children's Hospice, Evelina London and the British Red Cross.

They will also be greeted by carols and Christmas songs by the Action for Children Young Carers Aloud Choir, made up of 12 young carers aged six upwards. 

A royal aide said the princess – who will not speak on the night but will feature in a pre-filmed introduction to be broadcast on Christmas Eve – hoped the service would remind people of 'how precious' the early years of a child's life at a time when the world celebrates the birth of a newborn baby.

'It is a reminder of how unique this time is, and how precious those early years are, as we start to form our very first relationships, bond with those closest to us, and explore the world in which we live,' they said.

'It also signifies hope. As we look to the future, we hope our children will grow up in a happier, healthier, fairer, kinder and more tolerant world. A world based on love and compassion.

'This evening, Westminster Abbey will be filled with more than 1,500 inspiring people in appreciation of their selfless support as they work tirelessly to help the youngest members of our society to flourish.'

Royal Carols: Together at Christmas will air on December 24 at 7.45pm on ITV1 and ITVX