Picture: Prince Philip and Prince Harry following the Trooping the Colour Ceremony
The Royal wedding countdown is well and truly on as the ceremony between Prince Harry and Meghan Markle takes place this weekend.
However, there's speculation over what the current fifth-in-line to the throne will wear.
The British military has a whole host of uniforms fit for every occasion but which will Prince Harry choose?
It is being reported in the Telegraph that Harry has chosen to wear the ceremonial uniform of the Royal Marines.
If this is the case, the uniform will mark a sign of respect to the Corps that he took over as Captain General from his grandfather, the Duke of Edinburgh.
The Duke's association with the Royal Marines dates back 64 years to 2nd June 1953, when he was appointed Captain General in succession to the late King George VI.
Before his appointment Prince Harry already had a good relationship with the Royal Marines, having fought alongside them in Afghanistan during his time as an Apache helicopter pilot.
The Prince was present during the Duke's final official duty as Captain General where he received Major General Robert Magowan, Commandant General Royal Marines and Major General Charles Stickland, Commandant General Royal Marines Designate.
Prince Harry was welcomed into the Corps, by the men that served under his grandfather.
Major General Rob Magowan, Commandant General Royal Marines said:
"I am delighted by the announcement that Her Majesty The Queen has appointed Prince Harry to be our next Captain General."
But he has other options...
Whilst Palace officials have not yet confirmed what the Prince will wear, he could opt to dress in accordance with his most senior military appointment as an army captain in the Household Cavalry's Blue and Royals.
The Prince also has two additional honorary RAF and Royal Navy uniforms to choose from, because he was appointed Honorary Air Commandant of RAF Honington and Commodore-in-Chief of Small Ships and Diving.
He could be made an Army Colonel by the Queen ahead of his wedding and so, therefore, would wear that accompanying uniform instead.
William was told by his grandmother that he had to wear a red Guards' uniform on his wedding day because of his honorary title as Royal Colonel of the Irish Guards.
As it stands, Harry is likely to be in his Blues and Royals Officer's uniform in Dismounted Review Order, which he wore to William and Kate's wedding.
The uniform is navy blue with gold wire shoulder chords, ornamental gold braiding and red and gold cuffs.
Will Harry wear a blue sash like William?
No, he will not wear a blue sash across his uniform because he is not yet a member of the Order of the Garter.
But he will wear his Army Air Corps wings above his Queen's Golden Jubilee and Queen's Diamond Jubilee medals, and his Afghanistan campaign medals.