As PEOPLE previously reported, the big day is set for May 2017. The venue for the May 20 ceremony will be the church of St. Mark’s in Englefield, Berkshire, near the Middleton family’s home in Bucklebury. It is likely that the home will also be the setting for the reception.
The couple hopes to have a private wedding, and they are not planning to release many details. Middleton, 33, and Matthews, 41, have a “deep desire” to disappear from the spotlight in the longer term, a source tells PEOPLE.
Another source says they are looking forward to settling down and “having children and leading a quiet life.”
“He would never have bought something off-the-peg for her, it had to be very special,” a friend told PEOPLE. The classic design, with its octagonal halo of sparking channel-set diamonds, is thought to be close to flawless and worth more than $250,000. Boutique jeweler Robinson Pelham is said to have been privately commissioned by Matthews.
• REPORTING BY SIMON PERRY