Just like Prince William and Kate's royal wedding in 2011, Prince Harry and Meghan Markle's nuptials will boast a number of famous faces. The bride has reportedly invited a handful of her former Suits co-stars, including Abigail Spencer, while Sir Elton John has cancelled two gigs in Las Vegas in order to attend the wedding.
On Harry's side, fans can expect to see several members of the Windsor family, notably the Queen and Prince Philip, and the groom's father Prince Charles and his wife the Duchess of Cornwall. Prince William and Kate, who will have just welcomed their third child, are also among the high-profile guests.
Some lesser known royal guests – at least by name – will also be making an appearance, including Harry's close and distant cousins.
Click through our gallery to see which of the Prince's relatives you can expect to see on the day…
Lady Kitty Spencer
Kitty is the 27-year-old cousin of Prince William and Prince Harry on their mother's side. She is the niece of Princess Diana, and the eldest daughter of Diana's brother Charles Spencer. A regular fixture at Fashion Week and a model for Dolce & Gabbana, we can't wait to see what Kitty will wear!
Kitty's younger twin sisters Eliza and Amelia, 25, will also represent the Spencer side of the family.
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Their younger brother Louis is heir apparent to the earldom. Here the 23-year-old is pictured with older sister Kitty and mum Victoria.
Arthur Chatto is Harry's second cousin, and the grandson of Princess Margaret. His mum is Lady Sarah Chatto, Margaret's only daughter. Arthur was a page of honour to the Queen from 2009 to 2015, and attended Eton College.
The 19-year-old, who loves to document his passion for fitness on Instagram, is currently studying at the University of Edinburgh.
Arthur's older brother Samuel, 21, also attended Eton College and the University of Edinburgh.
Lady Amelia Windsor, 22, is the groom's third cousin, and the youngest child of the Earl and Countess of St Andrews.
She is one of the few royals who have verified Instagram accounts, regularly sharing enviable travel snaps from her holidays.
Amelia's older sister Lady Marina-Charlotte Windsor – Harry's third cousin – is also expected to attend the wedding. Here she is pictured with her cousin, Lord Frederick Windsor.
Harry's second cousin Lord Frederick Windsor is married to Sophie Winkleman, Claudia Winkleman's sister. Frederick, 38, also nicknamed Freddie, is the only son of Prince and Princess Michael of Kent.
Frederick's younger sister Lady Gabriella Windsor is also Harry's second cousin.
One very notable guest will be Princess Eugenie, the younger daughter of Prince Andrew and Sarah, Duchess of York. Eugenie – Harry's first cousin – is set to marry her fiancé Jack Brooksbank, also at St George's Chapel in Windsor in October.
Her older sister Princess Beatrice, 29, is also on the royal guest list.
Zara Tindall will be heavily pregnant at the time of the royal wedding as she and husband Mike are expecting their second baby this summer. The talented equestrian is the daughter of Princess Anne and Captain Mark Phillips, and Harry's first cousin.
Zara's brother Peter Phillips, 40, will attend the royal wedding with his wife Autumn. On the day of the nuptials, they will have just celebrated their tenth wedding anniversary; the couple also married at St George's Chapel in Windsor, on 17 May 2008.
Harry's second cousins Charles Armstrong-Jones and Lady Margarita Armstrong-Jones will likely attend with their parents, David Armstrong-Jones, Earl of Snowdon and Serena Armstrong-Jones, Countess of Snowdon.
Emily Hutt is Harry's cousin from his mother's side. She is the eldest daughter of Lady Sarah McCorquodale and Neil McCorquodale.
Lady Davina Windsor is Harry's second cousin, once removed. Here she is pictured with her husband Gary Lewis. She is the elder daughter of the Duke and Duchess of Gloucester.
Davina's younger sister is Lady Rose Gilman, here pictured with her husband George Gilman.