Pippa Middleton channels sister Kate in $89 maternity dress

The expectant mother was spotted out and about in the city wearing a label that has been favored by her sister during all three her pregnancies.

Pippa Middleton is expecting her first child with husband James Matthews, and was recently seen running errands in London wearing a amaternity dress from Seraphine, a label her sister, Catherine, Duchess of Cambridge, often wears.

Catherine wore Seraphine dresses regularly throughout all three her pregnancies with Princes George and Louis and Princess Charlotte, and even repeated some of her favorite looks a number of times.

Now it seems that her sister is taking a leaf out of her book for her first pregnancy.

The dress Middleton chose is a white dress with a blue lace fade on the skirt's hemline. It had a round neckline with thick spaghetti straps. It seemed a great light summery dress, falling on her knee.

She completed the look with a pair of sneakers and some round sunglasses. She had her hair pulled back off her face, and carried a brother leather handbag as she shopped away.

The dress would have set her back just $89.

Her big sister recently donned her own summer getup, wearing a pretty blue and white striped dress with drop sleeves as she attended a polo match with her two eldest children, Prince George and Princess Charlotte.

The garment cost the Duchess just $70 from Zara.

The button-down dress fell below her knees, and the Duchess completed the look with a pair of nude wedge shoes to make her trek over the grass easier.

Prince George, meanwhile, was dressed in a navy blue polo shirt, a pair of khaki shorts. His mother also added a pair of matching navy shoes to his outfit.

His sister was wearing a baby pink dress, with the top half of her hair tied up. She didn't feel the need to wear shoes on her tiny feet.