What wedding protocols will Princess Eugenie and Jack Brooksbank have to follow when they get married?
TODAY, Princess Eugenie is marrying long-term partner Jack Brooksbank in a lavish wedding ceremony in Windsor.
But like any member of the Royal Family, there are certain rules that the modern couple must follow.
The dress code
As Princess Eugenie is getting married in St George's Chapel in Windsor, the dress code is on the stricter side of things.
According to , Eugenie has taken notes from Meghan Markle and asked her female guests to wear dresses and hats for the special occasion.
In other words, strappy short numbers are a total no-go for the religious ceremony.
Men on the other hand have been asked to wear full morning suits complete with fitted S-shaped blazer and waistcoats.
Unlike a standard "lounge" suit, Princess Eugenie's preferred formal menswear attire even includes a top hat and pocket square.
And just to ensure that all guests follow suit (pardon the pun), it is suspected that they were sent additional clothing guidelines ahead of the big day.
The wedding rings
Another royal marital protocol states that aristocratic men don't always wear wedding rings.
For instance, neither Prince William nor his grandfather Prince Philip wear the symbolic jewellery.
However, Prince Harry followed in his father's footsteps earlier this year by choosing to wear a wedding ring when he married Meghan Markle.
What's more, Eugenie's father Prince Andrew never wore a wedding ring during his 10 year marriage to Sarah Ferguson and opted for a gold signet ring instead.
But considering how Jack Brooksbank is marrying into the Royal Family, it is expected that he will wear a wedding ring when he marries Princess Eugenie.
The seating arrangements
Although ordinary wedding guests are typically allowed to sit wherever they please, Princess Eugenie and Jack Brooksbank have a less flexible approach to their seating arrangements.
Royal protocol dictates that Eugenie's family must sit on the right-hand side of Windsor Chapel and each guest will therefore have been assigned a specific seat ahead of the big day.
Guest list and invitations
Also adapting royal tradition for their guest list, Princess Eugenie has invited 1,200 members of the public into the grounds of Windsor Castle to celebrate her marriage.
Like Harry and Meghan, Eugenie opened a ballot which allowed 1,200 lucky guests to watch the wedding on a live screen and "share the experience of their special day".
Naturally, Eugenie's grandmother The Queen (and head of the Church of England) will undoubtedly attend the ceremony along with Prince Philip and Prince Charles.
And although Prince Andrew's ex-wife Sarah Ferguson was not invited to Prince William's wedding in 2011, she will of course be sitting front and centre for her daughter's wedding ceremony.
The Princess has also invited 250 MORE guests to her Windsor wedding than Prince Harry and Meghan Markle - taking her total to 850 guests.
Details of the couple's wedding invitation have yet to be released.
The cake
While Royal Wedding cakes throughout the years have typically been pillared layers of lavish fruit cake, Prince William and Kate Middleton were the first to couple to buck this trend in 2011.
Although they still opted for a traditional fruit flavour, the couple chose a cake-on-cake stacked design which was eight tiers high and created by London-based baker Fiona Cairns.
Earlier this year, Prince Harry and Meghan Markle took this one step further by becoming the first ever royal couple to not serve fruit cake at their wedding reception.
The lemon and elderflower sponge was made by East London baker Claire Ptak from the Violet bakery in Hackney.
Princess Eugenie has also gone for something different, with a statement from the palace revealing: "Princess Eugenie of York and Mr Brooksbank have asked London based cake designer Sophie Cabot to make their wedding cake.
"The red velvet and chocolate cake will be a traditional cake, with a modern feel.
"It will incorporate the rich colours of autumn in its design and will be covered with detailed sugar work including ivy."
The reception
Like Meghan Markle and Prince Harry's special day, Princess Eugenie's wedding ceremony will also be a traditional royal affair followed by a carriage ride through Windsor.
However, the couple are bucking royal tradition by having a "festival and funfair"-themed wedding reception which has been organised by Peregrine Armstrong-Jones - the man behind David and Victoria Beckham's 1999 lavish ceremony.
Following a traditional champagne reception hosted by the Queen, 500 guests will reportedly ride dodgems and play on coconut shies as Eugenie's friends Robbie Williams and Ellie Goulding perform.
Eugenie's dress
As Princess Eugenie and Jack Brooksbank will be wedded in a Church of England ceremony, the bride will most likely opt for a dress which covers her arms and shoulders.
However, considering the evening reception will be a "festival and funfair"-themed affair, it is expected the newly-married bride will have an outfit change for the private party.
In a similar fashion to Kate Middleton, Meghan Markle also started the day in a traditional, full-length designer dress before changing into a slinky and modern Stella McCartney halter-neck for the couple's evening reception.
What will Jack Brooksbank's title be?
Despite Meghan Markle gaining the title of the Duchess of Sussex when she married Prince Harry earlier this year, Jack Brooksbank will not be given a royal title.
This is because Princess Eugenie is currently ninth in the line of succession and does not perform royal duties on behalf of the Queen.
This also means she didn't need an official letter from the Queen granting her permission to get married, like both Prince William and Prince Harry did.