Another historic royal wedding is set to take place this summer - the family's first same-sex nuptials.

Lord Ivar Mountbatten, a cousin of Queen Elizabeth II, first made history when he announced he was gay in 2016 and became the first member of the royal family to do so.

Following his announcement, Lord Mountbatten revealed he was in a relationship with James Coyle, who he will marry during the summer.

The wedding will be made even more special because Lord Mountbatten’s ex-wife will play a special part in the ceremony, it was revealed at the weekend.

Penny, with whom Lord Mountbatten has three daughters, told the Daily Mail she will be the one walking her ex-husband down the aisle.

“It was the girls’ idea,” she said of the new wedding details. “It makes me feel quite emotional. I’m really very touched.”

Lord Mountbatten’s first royal wedding, which he referred to as "the best day of my life," was attended by the Queen’s youngest son, Prince Edward and his wife Sophie, who have extended their blessing to the happy couple.

Speaking to the Mail, Lord Mountbatten said his royal relatives know of the plans and are “really excited for us.”

“Sadly they can’t come to the wedding. Their diaries are arranged months in advance and they’re not around, but they adore James. Everyone adores him,” he told the newspaper.

As for the plans for the big day, James revealed that the ceremony, taking place in the private chapel on Lord Mountbatten's estate in Devon, will be small and intimate, with just close friends and family in attendance followed by a bigger reception of 120 guests.

And while there will not be traditional wedding components such as a first dance, white doves or a wedding cake, there will be cheese, according to the pair.

In pictures: UK's first gay weddings Show all 16 1 /16 In pictures: UK's first gay weddings In pictures: UK's first gay weddings First gay marriages Lesbian couple Sarah Keith (left) and Emma Powell embrace while posing for photographs after their same-sex wedding at the Claremont Hotel in Brighton Reuters In pictures: UK's first gay weddings First gay marriages Sean Adl-Tabatabai, center, and Sinclair Treadway, right, pose for photographers with the openly gay mayor of Camden Jonathan Simpson, left, after they were announced officially married in a wedding ceremony in the Council Chamber at Camden Town Hall in London, Saturday 29 March, 2014 AP In pictures: UK's first gay weddings First gay marriages Helen Brearley (right) and Teresa Millward pose for photographs after getting married at Halifax Register Office Getty Images In pictures: UK's first gay weddings First gay marriages Gay couple Neil Allard (right) and Andrew Wale are married in the Music Room of Brighton's Royal Pavilion shortly after midnight in one of the UK's first same-sex weddings Getty Images In pictures: UK's first gay weddings First gay marriages Sean Adl-Tabatabai, third from left, and Sinclair Treadway, fourth from left, pose for photographs with, from left, the openly gay mayor of Camden Jonathan Simpson, deputy superintendent registrar Steven Lord and registrar officer Tania Uddin AP In pictures: UK's first gay weddings First gay marriages A woman waves a rainbow flag as gay couple Peter McGraith and David Cabreza leave Islington Town Hall Getty Images In pictures: UK's first gay weddings First gay marriages A solitary demonstrator holds a placard in protest against the legalisation of same sex marriage, outside St Margaret's Church, Westminster Abbey, London PA In pictures: UK's first gay weddings First gay marriages Sean Adl-Tabatabai and Sinclair Treadway look jovial as they tie the knot in front of around 100 guests AP In pictures: UK's first gay weddings First gay marriages The rainbow flag flies above British Cabinet Offices, marking the first day Britain has allowed same sex marriages, in London Reuters In pictures: UK's first gay weddings First gay marriages Lesbian couple Sarah Keith and Emma Powell (left) react after their same-sex wedding at the Claremont Hotel in Brighton Reuters In pictures: UK's first gay weddings First gay marriages A pair of shoes are pictured on a chair at a place setting during the reception after the same-sex wedding of couple Sarah Keith and Emma Powell in Brighton Reuters In pictures: UK's first gay weddings First gay marriages Camden mayor Jonathan Simpson speaks during the ceremony, which took place just after midnight on Saturday AP In pictures: UK's first gay weddings First gay marriages Sean Adl-Tabatabai looks on as his new husband Sinclair Treadway signs official documents AP In pictures: UK's first gay weddings First gay marriages Sean Adl-Tabatabai and Sinclair Treadway hold hands as they celebrate their marriage AP In pictures: UK's first gay weddings First gay marriages Sean Adl-Tabatabai and Sinclair Treadway toast married life AP In pictures: UK's first gay weddings First gay marriages Sealed with a kiss: Sean Adl-Tabatabai and Sinclair Treadway make it official AP

Of the couple's decision to marry and have a wedding, Lord Mountbatten said he wants to do it for his partner.

“For me, what’s interesting is I don’t need to get married because I’ve been there, done that and have my wonderful children; but I’m pushing it because I think it’s important for him,” Lord Mountbatten said. “James hasn’t had the stable life I have. I want to be able to give you that.”

Although the Queen has not commented on her cousin's upcoming nuptials, she has previously made statements in support of LGBT rights. During her speech at the State Opening of Parliament in 2017, she said: "My government will make further progress to tackle the gender pay gap and discrimination against people on the basis of their race, faith, gender, disability, or sexual orientation."