Kate Middleton's role as the future Queen is pivotal to the survival of the Royal Family.
Former butler of Princess Diana, Paul Burrell, claims that the family would "collapse" without her.
Burrell believes that the future of the family "rests" on Kate's shoulders.
Kate is in a similar position to Diana, who was also seen as the future of the monarchy.
Kate's role is especially important as she is married to Prince William, who will one day be King.
Burrell notes that the future seemed to rest on Diana Spencer in his day.
Kate's position is not enviable due to the immense responsibility she holds.
Kate has been given the title of Princess of Wales, the same title Diana held.
The future of the monarchy is underpinned by Catherine Middleton, according to Burrell.