Davina is mother to her daughters Holly and Tilly and son Chester
He will receive his MBE next month.
"It's a little weird," the masked singer commentator said. “I started writing in the royal family when I was eight years old. I began with a letter to the Queen. Found a waxed letter behind me.
“Then I wrote a Princess Margaretta, [and] after the Panorama interview on Princess Diana.
“I wrote to Prince Charles during his ‘Climategate’ when everyone was abusing him, I wrote to William and Kate.
He added: “I’ve got my MBE. We are so happy for you. It meant a lot to me.'
Davy is married to their father Matthew Robertson and is the mother of daughters Holly, 22, and Tilly, 20, and son Chester.