She wrote: "Seven years ago I was blessed with the perfect birthday pressie! Dorothy Francis Strawbridge.
"After the tears had gone I asked Dick to pass me my phone…
"I’d been taking pictures of ‘girls’ outfits for weeks, but, as we had kept the gender a surprise, I had not wanted to tempt fate, although in my heart I knew she was a little girl!
"Years have passed, and Dorothy is still our perfect little baby...Bossy, energetic and strong-minded...We just knew she was always going to be the boss here at the Chateau!
"This year, and hopefully for many years to come, I will spend part of my birthday (today) making sure Dorothy’s birthday (tomorrow) is magical."