Following the wedding at St George's Chapel in Windsor, Eugenie's title will become "HRH Princes Eugenie, Mrs Jack Brooksbank."
Royal historian Marlene Eilers Koenig told Hello!: "She will be styled either as HRH Princess Eugenie, Mrs. Brooksbank or she could choose not to use her husband's surname."
As for Brooksbank, he will not receive a royal title whatsoever.
It has been speculated that Eugenie's husband-to-be might have been granted a title upon the couple's marriage. However, royal experts have claimed that is not the case.
Many reported Jack would be granted the title, Earl of Northallerton, which is currently vacant, upon marrying Eugenie, but palace sources have revealed the royal family may decide not to give him one.
If the Royal Family decide to not grant Jack a title, he will technically remain a "commoner".
A source told Mail Online, "Eugenie couldn’t care less about titles and is perfectly happy to be Mrs Brooksbank."
Unlike her cousins Prince William, and Prince Harry, Eugenie has never been a "working royal."
This means that while Eugenie does attend royal events, she does so out of choice and is not obliged to.