The ceremony will take place on May 20 and St Mark’s Church in Englefield is where the union will be officiated.
According to the UK’s Daily Mirror, about 150 guests are expected at the event, with guests including Kate and William, Prince Harry, Ben Fogle and Roger Federer, and brother James Middleton with girlfriend Donna Air.
Prince Harry’s girlfriend Meghan Markle will attend the wedding but she is only invited to the reception and not to the ceremony.
Prince George and niece Charlotte will be taking roles of page boy and flower girl.
As far as the maid of honor is concerned, although Kate is expected to return the favor and fill in the role, she may step back in order to sure make sure she doesn’t steal the spotlight on her sister’s big day.
The biggest mystery is who will design the dress of the future Mrs. Matthews. The future bride and her mother Carole have been spotted shopping at top stores in London.
Suzanne Neville, Giles Deacon and Stephen Jones are some of the designer names that have been linked to the event.
As for the reception, the same publication reports that the couple has chosen the Middleton family’s manor in Bucklebury, Berkshire.