Article continues below advertisementScandal-dogged Sarah Ferguson's sharp wit and Princess Diana's insider knowledge led to the pair forming an unlikely bond in the early 1980s - and sharing savage digs at royal staff, OK! can reveal.As relative outsiders in the royal family, Ferguson, now 66, and Diana, Princess of Wales, forged a close friendship, finding common ground in their frustrations with the rigid Palace bureaucracy.Article continues below advertisementSource: MEGASarah Ferguson and Princess Diana were friendly in the early 1980s.