Not only is the blonde Zimbabwean expected to be at the church service – she will likely lend her support to Harry, 26, at the private reception, where he is set to deliver his best man’s speech late in the evening.
Harry and Davy, who broke up in 2009 after five years together, have been quietly seeing each other since rekindling their relationship late last year. In February, they were spotted having dinner in London.
Harry recently passed the latest stage of his military training, enabling him to fly Apache attack helicopters. He is set to be based in Suffolk, about 80 miles from London, where Chelsy is set to start her law job in September.