Princess Kate's brother reveals moment he knew sister was in love with Prince William

Princess Kate’s brother has revealed the moment he knew his sister was in love and how he felt “reassured” about her engagement to Prince William.

James Middleton, 37, said there was a “terrific buzz” across the UK over rumours Kate and William, both 42, were set to tie the knot.

But before an official announcement was made, he said his sister sat him and sister Pippa, 41, down in a quiet corner of a village pub in Bucklebury, Berks, in November 2010 to “whisper” the news.

And after the official announcement, James said he was walking around Battersea Park, south west London, when he realised it was true love.

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In his new book, James wrote: “I thought how lucky William was to be marrying my capable, down-to-earth big sister, and I felt absolutely reassured that they were in love.

“It was beautiful to see how he brought out her confidence. She’d blossomed. I knew he’d look after her, and he does to this day.”

James also opened up about his mental health battles, revealing in his memoir “Meet Ella: The Dog Who Saved My Life” that he “pushed” away his sister the Princess of Wales, during his darkest times.

The businessman, who credits his late dog Ella as his lifeline, admitted to being on the brink of suicide but would not even pick up calls from the royal or their family.

In his deeply personal book, James wrote: “I know I am privileged;

fortunate, too, to have a loving and close-knit family - mum and dad, my sisters Catherine and Pippa, their husbands William and James - but I push them all away.

“I do not answer their phone calls. Emails remain ignored. Invitations to visit go unheeded. I hide behind a double-locked door, unreachable.”