Pippa Middleton confirms pregnancy news in fitness column

Pippa Middleton has confirmed she is expecting her first child.

The Duchess of Cambridge's sister, who is married to hedge fund manager James Matthews, announced the "happy news" in a fitness column she writes for Waitrose's Weekend magazine.

The 34-year-old also revealed she had passed the first trimester without suffering the morning sickness her elder sibling experienced at the start of all three of her pregnancies.

Ms Middleton said she found keeping the news she was pregnant under wraps "hard", but said she would use her monthly column to keep readers up-to-date.

"I was lucky to pass the 12-week scan without suffering from morning sickness. That meant I was able to carry as normal and continue my sports," the fitness enthusiast said.

"Who knows what the next few weeks have in store," she added.

Speculation over Ms Middleton's pregnancy first emerged in April, days before the birth of the Duke and Duchess' third child, Prince Louis.