Pippa Middleton leaves Windsor Castle after the wedding of Princess Eugenie of York and Jack Brooksbank last week. Photo: Reuters
It's the first baby for Pippa and her husband James Matthews. Photo: Reuters
Middleton (35) first came to public attention when she acted as maid of honour at the 2011 wedding of her sister Kate to Prince William, who is second in line to the British throne.
A spokesman for William and Kate said they were "thrilled" for Pippa and her husband.
Middleton married millionaire financier James Matthews last year.
