According to US magazine The Globe, one of Diana's closest friend said that she recorded them with her parental advice in case her fears were realised and she would not be around to guide her children, the Daily Star reported.
The sensational revelation has come just weeks after a new investigation into her death was sparked by an SAS sniper's claims that Diana was killed by security forces.
The friend suggested that Diana had a chilling premonition about her death because of worries that she had made some dangerous enemies.
Diana's messages urged William and his future wife to cherish their kids for me and to let them know that she will love them and watch over them.
Although Diana never did meet Kate, the US magazine claimed that the secret tapes showed that she imagined William's bride to be "beautiful, smart and independent."
It's alleged that the voice on the tape says she knows that she would adore her daughter-in-law and they'd be fast friends.
The voice also said that she'd have to be someone truly special and if she wasn't then she wouldn't be her son William's wife.
Diana reportedly advised her future daughter-in-law to work at her marriage to survive the pressures of public life and warned her that being a future Queen makes marriage harder.
Diana reportedly ended the tape by wishing the couple a future that is free of the dark shadow that is casted by divorce.
--ANI (Posted on 29-09-2013)