Prince Harry's chances of becoming King are extremely unlikely, given the current line of succession to the British throne and the constitutional limitations in place. As the second son of Prince Charles, the Prince of Wales, and the late Princess Diana, Prince Harry occupies a relatively distant position in the line of succession.
At present, Prince Charles is the heir apparent to the British throne, and upon the passing of Queen Elizabeth II, he is expected to assume the role of King. After Prince Charles, his eldest son, Prince William, is next in line. Prince William's three children, Prince George, Princess Charlotte, and Prince Louis, follow him in the order of succession. This places Prince Harry quite far down the line, as he is currently sixth in line to the throne.
The line of succession is governed by the Act of Settlement 1701, the Succession to the Crown Act 2013, and other constitutional laws. These laws prioritize the direct descendants of King George VI, which includes Prince Charles and his descendants. The laws also reflect a preference for male heirs over female heirs, although this preference has been modified in recent years, with the Succession to the Crown Act 2013 introducing gender equality in the line of succession.
It is worth noting that Prince Harry's decision to step back as a senior member of the British royal family and move to the United States with his wife, Meghan Markle, has further distanced him from any potential path to the throne. In January 2020, the couple announced their intention to step back from their roles as senior royals and work to become financially independent. This move was followed by the couple's interview with Oprah Winfrey in March 2021, where they made several revelations that caused significant controversy and strained their relationship with the royal family.
In light of these developments, it seems highly unlikely that Prince Harry will pursue a path to the throne or even be considered for such a role in the future. His focus appears to be on his personal life, charitable endeavors, and professional pursuits, rather than royal duties and responsibilities.
However, it is important to remember that the British monarchy has a long and complex history, and circumstances can change over time. Future legislative changes or unforeseen events could potentially alter the line of succession. Nevertheless, based on the current constitutional framework and the position of Prince Harry within the line of succession, it is highly improbable that he will ever become King. The focus of the monarchy will likely continue to be on those individuals who are higher in the line of succession, particularly Prince Charles, Prince William, and their respective descendants.