Prince William arrives at Duke of Westminster's high-society wedding to Olivia Henson

On the morning of the wedding, the Grade I-listed cathedral looked absolutely spectacular, with the main doors adorned with a floral arch. The flowers on display inside the cathedral included rambling roses, philadelphus, campanula, and orlaya grandiflora, as well as birch trees. 

Following the wedding, the trees will be replanted at Hugh's family home, Eaton Hall, while the flowers will be repurposed and distributed to local organisations.

The bride and groom chose flowers from local growers through the 'Flowers from the Farm' network, which champions artisan growers. Many of the flowers seen also came from the Grosvenor's Eaton Estate.

Crowds started to form early on Friday morning, with well-wishers hoping to catch a glimpse of the well-heeled guests, the bride and groom, and Prince William.

Ahead of the wedding, Hugh, 33, acknowledged the interest in his big day, telling Town & Country: "I also just wanted to make it very clear how unbelievably helpful people have been, how supportive they've been so far which I'm unbelievably grateful for. 

"Because I do realise that it's going to be a big thing for the city. It's going to be certainly a huge thing for us, so we're just really grateful for all the help."

Looking smart in a morning suit, William was spotted arriving at Chester Cathedral with the rest of the ushers in a Mercedes van. They were dropped off at a side entrance.

William is the only senior royal in attendance, despite rumours that his ten-year-old son Prince George, the groom's godson, would act as one of Hugh's pageboys.

William's cousin Princess Eugenie was not previously reported to be attending the wedding, although she had been spotted in Chester enjoying pre-wedding drinks with other guests on Thursday night.

Making an appearance at around 11am with her friend and former Vogue editor Violet Henderson-Vestey, the mother-of-two looked delightful in an olive green number by Joseph and a cream fascinator by Emily London Millinery.

She accessorized with an Anya Hindmarch clutch and wore nude suede pumps by Aquazzura.

Prince Harry's childhood friend Charlie van Straubenzee and his wife Daisy were among the guests pictured arriving.

Prince William's good friend Thomas van Straubenzee and his wife Lucy also made up the guest list. 

Thomas is one of Princess Charlotte's godfathers, while Lucy taught Charlotte and George at their previous London school, Thomas's Battersea.

Another of Prince William and Prince Harry's close friends, Charlie Gilkes, and his wife Anneke, travelled to Chester for the high-society wedding.

Prince William's close friend Edward van Cutsem was spotted arriving with another guest. 

Edward is married to the groom's sister Lady Tamara Grosvenor; the couple also chose to say "I do" at Chester Cathedral 20 years ago.

The groom and his best men rocked up at the cathedral in a green Land Rover Defender.

Looking just a little nervous, Hugh was met with cheers and applause as he arrived at Chester Cathedral at around 11:15am. He smiled and waved to the crowds of well-wishers.

The groom was welcomed by The Very Revd Dr Tim Stratford, the Dean of Chester, who will be conducting the ceremony.

The Right Revd Mark Tanner will preach, while Revd Canon Rosie Woodall will lead the prayers.

Speaking exclusively to HELLO! on the eve of the wedding, the Dean shared the significance of holding the wedding at the Duke's family church, highlighting Chester as a place the bride Olivia "has fallen in love with". He also expressed his pride in the couple for choosing this special venue for their wedding.

Members of the Grosvenor family who were spotted filing into the cathedral included the groom's mother, Natalia, Duchess of Westminster, who was widowed in 2016 when her husband Gerald Grosvenor, 6^th Duke of Westminster, died unexpectedly of a heart attack.

Natalia looked pretty in pink, matching her daughter Lady Edwina.

Natalia was flanked by her three daughters and Hugh's sisters, Lady Tamara, Lady Edwina, and Lady Viola, who all waved to the crowds before heading in for the ceremony.

Shortly before noon, blushing bride Olivia arrived at the cathedral with her father Rupert Henson.

They were chauffeured in a vintage Bentley, provided by the Heritage Collection of Bentley Motors in Crewe. The car was originally made for W.O. Bentley, the founder of Bentley Motors, in 1930.

Olivia, 31, looked absolutely exquisite in a wedding dress and veil designed by London-based Emma Victoria Payne. 

The bespoke embroidery design on her gown and veil was hand drawn and reimagined by the designer, incorporating floral motifs and edgings from Olivia's great great grandmother's veil from around 1880.

Much had been said about which tiara Olivia would wear on her wedding day. 

She accessorized with the Faberge Myrtle Leaf Tiara made specifically for Grosvenor brides to wear at their nuptials. The tiara has been in the Grosvenor family since its creation in 1906.