Here’s a look at Prince Harry and Meghan Markle’s wedding in numbers:

0 – Maids of Honour – all the bridesmaids will be children

1 – Best man – Harry’s brother, the Duke of Cambridge

1 – Hour – the length of the wedding ceremony

2 – rings – one for each. Not all royal grooms have chosen to wear one.

Meghan's engagement ring (Dominic Lipinski/PA)Meghan’s engagement ring (Dominic Lipinski/PA)

2 – Diamonds from Diana, Princess of Wales’s collection used for Ms Meghan’s engagement ring, plus one from Botswana

3 – Diana’s siblings at the service

4 – the number of pageboys at the service, including Prince George. There will also be six bridesmaids, including Princess Charlotte.

6 – Harry’s position in line to the throne

6 – Windsor Grey horses taking part in the carriage ride

Prince George and Princess Charlotte will be among the page boys and bridesmaids (Arthur Edwards/Sun/PA)Prince George and Princess Charlotte will be among the page boys and bridesmaids (Arthur Edwards/Sun/PA)

7 – Charities Harry and Meghan picked to receive public donations instead of wedding gifts

16 – The wedding will be the 16th royal wedding or blessing to take place in St George’s Chapel since 1863

20 – the temperature in degrees centigrade forecast by Meteogroup for Windsor as the ceremony begins at 1200

33 – Harry’s age

Frogmore House will host the evening do (Martin Keene/PA)Frogmore House will host the evening do (Martin Keene/PA)

36 – Meghan’s age

200 – Guests invited to the Frogmore House evening reception

200 – the number of Amalfi lemons being used in the cake recipe being created by baker Claire Ptak.

600 – Congregation in St George’s Chapel

The cake for the wedding of Prince Harry and Meghan Markle (Hannah McKay/PA)The cake for the wedding of Prince Harry and Meghan Markle (Hannah McKay/PA)

2,640 – People specially invited into the grounds of the castle including: 100 school children; 200 people from charities linked to Harry and Meghan; 530 members of the Royal Households and Crown Estate; 610 Windsor Castle community members; and 1,200 members of the public nominated by Lord Lieutenants.

5,000 – UK and international media accredited in Windsor

100,000 – Estimated number of visitors in Windsor on the day

£6.3 million – Cost of policing the Duke and Duchess of Cambridge’s wedding in 2011.

26 million – the number of people who watched Harry’s brother William marry Kate Middleton on British TV on April 29 2011.