Pippa Middleton, 34, 'is pregnant' with husband James Matthews

Pippa Middleton, the sister of Catherine, the Duchess of Cambridge, is reportedly pregnant with her first child. Photo / Getty

Pippa Middleton is pregnant, it has been reported.

The younger sister of the Duchess of Cambridge and her husband James Matthews are said to be expecting their first child in October.

She reportedly had a 12-week scan last week and has apparently revealed the news to family and friends, reports Daily Mail.

The couple are said to be "overjoyed", the Sun on Sunday reports.

Pippa and James Matthews began dating in 2016 and married near her family home last year. Photo / Getty Images

Pippa's representatives has been contacted for comment.

It comes after a tough few weeks for the family following allegations of rape against her father-in-law David Matthews. He strenuously denies them, calling the claims "untrue and scandalous".

The Duchess of Cambridge "could not have been more delighted" when she heard the news, it is reported.

Kate herself is pregnant with her third child and was reportedly the first person to be told after James Matthews.

A friend apparently said the news had provided "much-needed happiness and light relief" to the family.

The couple married in May last year. Pippa chose St Mark's Church, Englefield, Berkshire, as the venue, seven miles from her family home.

She beamed with happiness as she displayed her figure in a fitted guipure lace gown by the British couturier Giles Deacon.

James Matthews is the brother of former Made In Chelsea star Spencer Matthews, who served as best man during last year's wedding.

Pippa's husband worked in Eden Rock Capital Management, named after his parents' luxurious hotel, Eden Rock, on the Caribbean island of St Barths.