Popsugar Fashion Celebrity Fashion Kate Middleton Blue Seraphine Dress Kate Middleton Tried to Hide This $100 Dress From Our Fashion Girl Eyes 23 January 2018 by Sarah Wasilak Image Source: Getty As POPSUGAR editors, we independently select and write about stuff we love and think you'll like too. If you buy a product we have recommended, we may receive affiliate commission, which in turn supports our work. Kate Middleton might have been wearing an old Sportmax coat when she stepped out for a Heads Together event at Roe Green Junior School in London, but what was underneath was quite a surprise. Kate didn't show off her custom Séraphine maternity dress ($99) until she was ready to give her speech, but once she did, we were smitten by the cut and color, a royal shade Kate wears so well. The three-quarter-sleeved design comes complete with two gold buttons at the waist and a slightly flared skirt, a forgiving silhouette for moms to be. The number was available to shop at the time Kate debuted it, and even if you're not expecting, we found similar takes on the modest sheath. Ahead, check out Kate's piece, accessorized with Rupert Sanderson heels and a G Collins & Sons sapphire pendant to match her engagement ring, then choose your favorite version of her look and shop away. Image Source: Getty / Karwai Tang Image Source: Getty / WPA Pool Image Source: Getty / WPA Pool Image Source: Getty / WPA Pool Image Source: Getty / WPA Pool Image Source: Getty / WPA Pool Kate's Custom Royal Blue Sèraphine Dress Sèraphine Royal Blue Tailored Maternity Dress ($99) Sèraphine Royal Blue Tailored Maternity Dress $99 from seraphine.com Buy Now Michael Kors Stretch Boucle Crepe Dress Michael Kors 3/4-Sleeve Stretch Boucle Crepe Dress ($1,995) Michael Kors Evening Dresses from bergdorfgoodman.com Buy Now New York & Co. Button-Accent Sheath Dress New York & Co. Button-Accent Sheath Dress - Petite ($29, originally $65) New York & Co. Petite Dresses from nyandcompany.com Buy Now ELOQUII Button Front Fit and Flare Dress ELOQUII Button Front Fit and Flare Dress ($100) ELOQUII Dresses from eloquii.com Buy Now Tibi Crepe Shift Dress Tibi Crepe Shift Dress ($119, originally $395) Tibi Day Dresses from saksfifthavenue.com Buy Now Aryeh Three-Quarter Sleeve Dress Aryeh Three-Quarter Sleeve Dress ($64) Aryeh Three-Quarter Sleeve Dress $64 from shoptiques.com Buy Now Tory Burch Sydney Pleated Shirt Dress Tory Burch Sydney Pleated Shirt Dress ($448) Tory Burch Day Dresses from bloomingdales.com Buy Now Halston Women's Ponte Dress Halston WOMEN'S PONTE DRESS ($159, originally $395) Halston Cocktail Dresses from barneyswarehouse.com Buy Now Talbots Flounce Refined Ponte Sheath Dress Talbots Flounce Refined Ponte Sheath Dress ($129) Talbots Petite Dresses from talbots.com Buy Now Miss Finch Hi-Lo Tie Sleeves Dress Miss Finch Hi-Lo Tie Sleeves Dress ($52, originally $59) Miss Finch Hi-Lo Tie Sleeves Dress $52 from shoptiques.com Buy Now Celebrity FashionThe RoyalsShoppingCelebrity Maternity StyleThe British RoyalsSeraphineMaternity StyleGet The LookWinter FashionDresses