As Prince Harry and Meghan Markle's wedding draws nearer, royal watchers are poring over the details of the big day.

We have a few details to go on, including the invitations that the couple have sent to their guests. It's simple and elegant, stating that "His Royal Highness The Prince of Wales KG KT requests the pleasure of the company of (name) at the marriage of His Royal Highness Prince Henry of Wales with Ms Meghan Markle," at the nuptials at St George's Chapel in Windsor Castle on Saturday 19 May. Some very eagle-eyed royal observers have spotted that the wording is very slightly different to that in the wedding invitations sent out for Prince William and Kate Middleton's big day in 2011. Their invites referred to Kate as "Miss Catherine Middleton" while Meghan is "Ms Meghan Markle". The Ms, as opposed to Miss, nods at Meghan's previous marriage. The actress was married to producer Trevor Engelson between 2011 and 2013. "The wording referring to Meghan on the wedding invitations is a first but this is a unique wedding," royal expert Richard Fitzwilliams told The Independent. "Ms is the correct way to refer to a divorced woman before either her birth name or married name." It wasn't meant as a dig at the bride-to-be, though. "It is also appropriate as Meghan is a feminist," Richard continued. "The use of Ms is a contemporary way of avoiding using Mrs or Miss and I think it certain that this is also something Meghan would have approved of."