No, Prince William, the Duke of Cambridge, is set to inherit the British throne after his father, Prince Charles. Prince William is the elder son of Prince Charles and is next in line to succeed him as the future King of the United Kingdom.
Prince Harry, the Duke of Sussex, is the younger son of Prince Charles and is currently sixth in line to the throne. As William's younger brother, Harry has a lower position in the line of succession, and unless there are significant changes, it is unlikely that he will inherit the British throne.