The Duchess of York pays special tribute as she mourns devastating loss

Sarah Ferguson has reached out to good friend Lisa Marie Presley, following the tragic death of her son, Benjamin Keough.

• The Duchess of York reached out to her 'sister' Lisa on social media following the death of her son
• Sarah thanked her for being there in her 'darkest moment' and promised to do the same
• In other royal news, Prince Charles future plans as King dashed due to Meghan and Harry?

The Duchess of York is mourning the loss of the son of one of her best friends.

Sarah Ferguson reached out to close friend and "sister," Lisa Marie Presley, following the tragic death of her 27-year-old son.

Fergie, 60, took to Instagram to share a sweet photograph with Lisa and wrote, "You stayed with me in my darkest moment and I am here in Yours .. love you my sister Lisa Marie .. wherever, whatever I am with you, in all steadfastness.

READ MORE: Sarah Ferguson gives rare glimpse into life with Prince Andrew

"Dearest Lisa Marie, Finley, Harper and Riley. You have a family here and I love my sissy .. love you to your heart and will never stop loving my sissy @lisampresley."

It follows the tragic news of her son's death - the only grandson of the late, great Elvis Presley.

Lisa Marie's manager confirmed the sad news over the weekend and said her son's alleged suicide had left her "beyond devastated".

"She is completely heartbroken, inconsolable and beyond devastated but trying to stay strong for her 11-year-old twins and her oldest daughter Riley," Roger Widynowski said in a statement.

"She adored that boy. He was the love of her life."

Having been through a turbulent year herself, Fergie knows first-hand how it feels to suffer "dark moments".

Things haven’t been easy for the family in recent months after Prince Andrew’s friendship with convicted sex offender, Jeffrey Epstein, forced him to step down from royal duties for the “foreseeable future”.

Breaking her silence on the scandal that rocked the family, she said, “When I talk about Prince Andrew, I talk about family because the last six months have been hard on the girls and me. To see such a wonderful man go through such enormous pain.

“He is the best man I know. It’s just incredible what he has done for Britain, and it’s all nonsense, so I talk about familyhood, and I’m very strong about it. The mental health of men is important and I think it is vital to articulate that more.”