Sarah Ferguson has revealed the Queen is more of a mother to her than her own mum was.
The Duchess of York said the monarch is her greatest mentor and has never faltered when it came to believing in her.
Speaking on the Tea with Twiggy podcast, Fergie said she admires the way Her Majesty is so modern and flexible.
The 61-year-old added her ex-husband Prince Andrew 'always' believed in her after she became deeply insecure due to the pain of losing her mum who died in a car crash.
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Fergie's mum Susan Barrantes - who left her family to move to Argentina with a professional polo player - died in 1998 just a year after the death of Princess Diana.
Fergie said: "I think to myself that honestly my mother-in-law has been more of a mother to me than my mother.
"I absolutely think there is no greater mentor because from a little girl to now, the consistency of Her Majesty has been a great honour and makes me want to cry."
She added: "Because I went through so much pain losing mum, I lost my way and I became deeply deeply insecure.
"I kept asking everybody for advice. And I never trusted my own judgement of myself.
"I have got my lovely ex-husband Andrew - he always believes in me and always did believe in me.
"But my greatest mentor - and I know this sounds so weird to say it - and person who believes in me is the Queen and has never faltered."
Commenting on another royal relationship last week, Fergie said Princess Diana would have approved of both Prince William and Prince Harry's wives - regardless of "Megxit".
The Duchess of York said the late princess would have been “very proud” of both of her boys.
She said: "What I think that she would have been is very proud of her boys standing firm and tall. They're very like her, and she would have been very proud.
“I think they're exceptional, exceptional boys with exceptional wives and fabulous children. I think she would be going, ‘Yes!’”
