James Middleton offered a touching glimpse into Kate Middleton's bond with Prince William in his memoir, "Meet Ella: The Dog Who Saved My Life," which hit bookshelvesin September. The book includes a treasure trove of stories about his royal sister and her relationship, revealing how her life and personality were profoundly changed by meeting the future king. READ MORE: Kate Middleton and Prince William's heartfelt gesture to Peckham food bank raided by thieves In an intimate reflection on Kate's journey to becoming first a duchess, then a princess, James shares a poignant memory from just after her engagement to the Prince of Wales was made public in 2010, reports the MailOnline .

'We'll always be there for each other' "Our family knew a day or so before it is officially announced in November 2010," he writes in a passage. "Catherine, Pippa and I go out for a walk with Ella and Tilly to our local pub in a village close to Bucklebury. We sit in a corner, chattering quietly.

"Pippa and I want to be visibly excited, but we have to tamp down our emotions so no one suspects a thing. "We make a quiet acknowledgement that we'll always be there for each other, look out for one another, support each other. No matter how crazy things get.

" James opened up about how Prince William has transformed not only his sister's life but also their family's. He wrote: "William has been in our lives for so long and we've grown very fond of him," adding that the prince feels like an older brother t.