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Pippa Middleton has been spotted wearing an affordable maternity dress and we have a feeling it's going to sell out before long. It's the Seraphine Printed Woven Maternity Shirt Dress and there are two fabulous options. The black print complete with a black belt is €49, reduced from €85 while the red dress is reduced from €89 to €62.

Pippa Middleton's maternity dress is under $70 and starting to sell out: https://t.co/wqpNgZqJ0M pic.twitter.com/RPnvXfGaZu

— Who What Wear (@WhoWhatWear) June 18, 2018

Pippa is a fan of the darker option but then we do love the red design as the brighter option is perfect for summer. Given that Pippa has been pictured in the maternity design, we have a feeling the dress will sell out before too long. Her sister Kate is also a fan of the label and she wore Seraphine when pregnant with both Princess Charlotte and Prince Louis.

Kate's wearing her @SeraphineLtd Florrie dress. https://t.co/6zNgUjnu9w pic.twitter.com/KtFhBwP1YW

— Duchess Kate Blog (@HRHDuchesskate) January 10, 2018

Pippa recently confirmed that she was expecting her first child with husband James Matthews, writing about her pregnancy news in her Waitrose Weekend magazine column. The 34-year-old said that she had been lucky not to experience morning sickness thus far, unlike her sister, the Duchess of Cambridge, who experienced hyperemesis gravidarum during her three pregnancies and had to be hospitalised for a period of time. Pippa explained:

"I was lucky to pass the 12-week scan without suffering from morning sickness. That meant I was able to carry on as normal. This being my first pregnancy, I had so many questions I felt were still unanswered."