St George's Chapel at Windsor Castle.
The royal family will pay for the wedding, including the church service, the music, the flowers and the reception, the palace said.
The newly engaged couple will Wednesday at St. George's Chapel in Windsor Castle, England, which is also where Harry's father, Prince Charles and Camilla Parker Bowles married in 2005.
The Royal couple confirmed more details of their big day after announcing their engagement on Monday, following weeks of speculation.
St. George's Chapel contains the tombs of 10 royals, including Henry VIII and his third wife, Jane Seymour.
Of course, a royal engagement means a royal wedding is in our future-and if Prince William and Kate Middleton's nuptials from 2011 are any indication, we're in for a no-expense-spared extravaganza.
St George's Chapel. Formal but not too formal. Prince Charles and Camilla Parker-Bowles had a televised religious blessing there after they had a civil wedding ceremony nearby in 2005.
Windsor Castle, which is about an hour and a half away from London, has less than half the capacity than the abbey-800, compared to 2,000-and is a "very special place" for the couple, who "regularly spent time there over the a year ago and a half" and are "grateful to The Queen for granting permission for the use of the Chapel", according to Prince Harry's spokesperson.
Prince Harry and his fiancee also hope to allow members of the public to feel part of the celebrations and are considering how to make that happen.
"This wedding, like all weddings, will be a moment of fun and joy that will reflect the characters of the bride and groom."