The couple will marry Friday, April 8, in St. George's Chapel, which is part of Windsor Castle. Former Archbishop of Canterbury George Carey recently urged the couple to marry, apparently signaling the Church of England's blessing.
Charles's parents, Queen Elizabeth and Prince Philip, reportedly gave the two divorcees their "warmest good wishes for their future together," a statement from Charles's residence, Clarence House, said.
Parker Bowles, 57, will never have the title of queen when Charles ascends the throne, but rather the princess consort. In the meantime, she will be called the duchess of Cornwall after marriage, stemming from Charles's role as the duke of Cornwall.
Charles, 56, married the late Diana at St. Paul's Cathedral July 29, 1981, and they divorced in 1996. She died the following year.
Charles had dated Parker Bowles after they met at a polo match in 1970. Although she later married cavalry officer Andrew Parker Bowles, she and Charles remained close. She was divorced in 1995.