Pippa Middleton Wore a $99 Summer Dress From Kate's Favorite Maternity Brand

Pippa Middleton, sister of Kate (i.e., the duchess of Cambridge) might not technically have a royal title, but she's long proved to be the queen of the summer dress. Now expecting her first child, she'd adapted to maternity style quite well—and it seems she's borrowing a tip from her older sibling's fashion record, stepping out in a dress from one of Kate's favorite maternity lines.

On Friday Pippa was spotted walking her dog wearing a $99 black off-the-shoulder dress (which she opted to wear on-the-shoulder) by London-based Séraphine. Check out the outfit, below.

<h1 class="title"><em>EXCLUSIVE</em> Pregnant Pippa Middleton seen walking her dogs in Chelsea</h1><cite class="credit">XPOS/Backgrid</cite>

EXCLUSIVE Pregnant Pippa Middleton seen walking her dogs in Chelsea

XPOS/Backgrid

The brand is perhaps best known for being one of the duchess of Cambridge's fashion go-tos during her past three pregnancies. She wore its Florrie Printed Woven Maternity Dress in January while pregnant with Louis—and had previously worn it in 2015 while pregnant with Charlotte.

Kate Middleton in Séraphine's Florrie Printed Woven Maternity Dress in January 2018

The Duchess Of Cambridge Visits Reach Academy Feltham With Place2Be

Kate Middleton in Séraphine's Florrie Printed Woven Maternity Dress in January 2018
Eddie Mulholland - WPA Pool/Getty Images

She also wore Séraphine's $169 Royal Blue Tailored Maternity Dress for the Royal Foundation Forum in February with now sister-in-law Meghan Markle.

<h1 class="title">First Annual Royal Foundation Forum</h1><cite class="credit">Chris Jackson - WPA Pool/Getty Images</cite>

First Annual Royal Foundation Forum

Chris Jackson - WPA Pool/Getty Images

It's not Pippa's first time wearing the label, either: She's also donned Séraphine's $109 Printed Woven Maternity Shirt Dress.

<h1 class="title"><em>EXCLUSIVE</em> Pregnant Pippa Middleton shows off her blossoming baby bump</h1><cite class="credit">XPOS/BackGrid</cite>

EXCLUSIVE Pregnant Pippa Middleton shows off her blossoming baby bump

XPOS/BackGrid

The Middleton sisters aren't the only public figures who love the brand: Séraphine has been worn by Gwen Stefani, Jessica Alba, and Kate Hudson.

Related Stories:

A Look Back at Kate Middleton's Best Maternity Style

Here's Your First Look at Pippa Middleton's Gorgeous Wedding Dress

Here's Where Pippa Middleton Shops for All of Those Pretty Summer Dresses