As they get increasingly serious, many think Prince Harry, 33, will ask Meghan Markle, 36, to marry him.
If the couple do become engaged and eventually wed, there will be a host of rules for Meghan to follow. Earlier this week it was revealed she would most likely have to give up her acting career if she did marry the Prince.
On top of the hard and fast protocols that come with being a member of the Royal Family, there are also quirks and traditions she will have to get to know.
So what should the Suits actress expect if she marries into the British Royal Family?
The couple will need the permission of the Queen to wed
This is because of Prince Harry’s position in line to the throne.
The rule dates back to 1701, when the Act of Settlement was passed to prevent a Catholic from getting the crown.
However, rules have been updated so that now the Queen only needs to grant permission to the first six members of the Royal Family – at the moment this is Prince Charles, Prince William, Prince George, Princess Charlotte, Prince Harry and Prince Andrew.
Meghan’s wedding bouquet will be chosen for her
Or at least it will to some degree. Every royal bride since Queen Victoria has had myrtle in her wedding bouquet.
It is not just any myrtle, but is from the shrub planted by Queen Victoria at Osborne House on the Isle of Wight.
Myrtle symbolises chastity, marital fidelity and good luck and love in marriage.
Meghan will also have little say over her wedding ring
From the Queen Mother right through to the Duchess of Cambridge, royal brides have worn wedding bands containing Welsh gold.
Like the myrtle, this isn’t just any Welsh gold, but gold that comes from the same nugget mined in North Wales.
Welsh gold is three times more valuable than other types of gold.
Meghan will have to keep her political views private
The Suits actress has been vocal about political issues in the past, sharing a post to Instagram which appeared to be anti-Brexit, and slating Donald Trump.
Members of the Royal Family have no such freedom and are expected to stay politically neutral.
Meghan should perfect her curtsey
The Queen and other members of the Royal Family are sticklers for etiquette, and bow or curtsey to each other depending on rank both in public and private.
The rules are complicated, and were last updated when Kate Middleton married William. The Order of Precedence, which sets out the rules on who must curtsey to who, is likely to be updated if Meghan joins the family.
Where each member of the family stands in relation to the Queen for photos, and who arrives first to events, is also dictated by the Order of Precedence.