It means the couple's wedding will take place on the same day as the FA Cup final.
Kensington Palace confirmed that the happy couple will Wednesday on Saturday, May 19 next year.
Mr Knauf said Harry and Ms Markle "want the public to feel part of their day" - and are looking at ways to achieve that.
Prince Harry is already firmly ensconced as a member of the Church of England thanks to his royal lineage and Meghan will be baptised and confirmed in the same religion before the big day.
According to the BBC, the wedding - including the service, music, flowers and reception - will be paid for by the Royal Family.
Spain risk World Cup expulsion
If the national federation were to be suspended, Spain's team would not be allowed to play at next year's World Cup. Ramos said: "I can't believe we could miss out due to such a dispute".
Royal weddings usually take place on a weekday however, Prince Harry's wedding breaks the tradition.
The actress will not be continuing her work on gender with the United Nations or with other organisations, but instead will be starting her charity work as a full-time royal afresh.
Harry and Markle first met for a drink in July 2016 on a blind date, brokered by a mutual friend, whose name they would not reveal, but "it was definitely a setup", Markle said in the interview.
The Duke and Duchess of Cambridge said: "We are very excited for Harry and Meghan". Those keen to visit Windsor for Harry and Meghan's wedding are now being urged to contact hotels directly for bookings.
The royal couple, who have been dating for a year and a half had recently announced their engagement in November.
She is expected to become a duchess - just like Kate Middleton did when she became the Duchess of Cambridge after saying her vows in 2011.
He added: "We know that the eyes of the world will be on Windsor next May and we couldn't think of a better way to kick off the summer than by welcoming a royal wedding".