People will have to go through body scanners to get to the town of Windsor in the lead up to the ceremony in St George's Chapel on May 19.
More than 100,000 people from across the world are expected to travel to Windsor to watch Harry and Meghan tie the knot.
With the USA actress a big draw to both British and American fans, huge crowds are expected, with the processional route of the carriage ride estimated to hold around 100,000 spectators.More news: Mueller's Office Asks Judge to Imprison Accused Lawyer Alex Van Der Zwaan
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Officers will not be moving on rough sleepers although they, and possessions like sleeping bags, will be searched like other spectators along the carriage route. This will include armed and unarmed officers, as well as search dogs, mounted police officers and the National Police Air Service.
Visible measures such as Automatic Number Place Recognition (ANPR), security cameras and heavy security barriers will be put in place -- the latter to mitigate the threat of cars being used to attack the crowd.
It reads, "Prince Harry and Ms. Markle are pleased that members of the Armed Forces will play such a special role in their wedding".
Harry and Meghan have invited 600 guests to attend their wedding and 200 family and friends will be at an evening reception hosted by the Prince of Wales at Frogmore House.
"We are located right opposite Windsor Castle, and with the up and coming wedding being held there we thought a royal gin would be a great addition to our existing 100 gins", says Emma Stevenson, who works in marketing at Oak Taverns, who operates The Queen Charlotte in Windsor. "We are working with our partners, local businesses and the community to deliver a safe, secure and happy event for everyone".