Formerly of East Malling, Mr Pelly is thought to have asked the princes to be ushers at his wedding to Holiday Inn heiress Lizzy Wilson in 2014.
The family held a private ceremony with close family, however, the Queen and Prince Philip did not attend.
The mantra of Prince Louis's christening this week might as well have been "gang's all here", because the baptism of the little prince brought tons of royals out of the woodwork in a way we've never seen.
He was baptized at the Chapel Royal on the grounds of St James's Palace in London, just like his older brother George.
The Duke and Duchess of Cambridge, Prince William and wife Kate, are now celebrating the christening of their third child, Prince Louis!
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Louis is fifth in the line of succession to the British throne after his grandfather Prince Charles, his father William, George and Charlotte.
It is created to look like the robe Queen Victoria's eldest daughter wore in 1841!
The Archbishop of Canterbury welcomed the royals, bending down to greet George and Charlotte, who looked happy and content, at the entrance to the chapel. Prince George, who will turn five next week, and Princess Charlotte, three, looked adorable as always as they accompanied their parents and new sibling to the private service.
The Duke and Duchess of Cambridge started their own tradition when it came to christening their children, making the "personal decision" to have their first child, Prince George, baptised at the intimate Chapel Royal at St James's Palace.
Lucy Middleton: She is the Duchess of Cambridge's cousin and a solicitor. A royal source said it had been agreed some time ago that the queen would not attend and her absence was not due to any health issues.