The letter, as part of a series written by the late Princess Diana, was just auctioned off in England.

Letters sent by Britain's late Princess Diana - including one in which she described a young Prince Harry as being "constantly in trouble" while at boarding school - sold for thousands of pounds at an auction Thursday.

"The boys are well and enjoying boarding school a lot, although Harry is constantly in trouble,” Princess Diana wrote in a letter from October 17, 1992.