
Leakproof underwear, lingerie and sleepwear inspired by the Courts of Prythian bring the beloved fantasy world to life as anticipation builds for Sarah J. Maas' next book in the series
NEW YORK, Oct. 5, 2026 /PRNewswire/ -- Knix today unveiled an exclusive collaboration with A Court of Thorns and Roses (ACOTAR), giving the book world's most talked-about fantasy series its first one-of-a-kind intimate collection. With more than 85 million Sarah J. Maas books sold in English alone and over two million ACOTAR posts on TikTok, the series has become a cultural phenomenon and the heart of one of BookTok's most passionate communities.
Officially launching October 15, the collection brings the world of Prythian into Knix's signature leakproof underwear and sleepwear. For the past decade, Knix has championed intimates that fit every body and help people feel confident enough to take up space, while ACOTAR has cultivated a similarly passionate fandom around characters who embrace their power and refuse to make themselves smaller.
It's fitting, then, that the idea started with Knix's own fans and champions internally, long before it became official. The team saw a natural connection between the brand and the passionate ACOTAR fandom and pursued the partnership, securing the license through ACOTAR's licensing agency, IMG Licensing. Once the collaboration was already underway, Knix turned to its community on social media to ask who they would most want to see the brand work with next – and the answer was overwhelming ACOTAR. That enthusiasm reinforced what the team already knew: this was a partnership our community genuinely wanted. The collaboration marks Knix's first book-inspired collection, introducing the brand to one of publishing and BookTok's most passionate fandoms. From there, more than 40 self-proclaimed ACOTAR super-fans across design, marketing and leadership jumped in to help bring the collection to life, proof that this was a partnership the whole team was genuinely excited to be part of.
"ACOTAR fans are some of the most passionate people on the internet, and I'm one of them," said Nicole Tapscott, President of Knix. "I've read every book, and getting to bring this world into our products has been a dream. This collection is everything Knix stands for: feeling amazing in your own skin, with a little more power, desire and self-expression baked in. It's a natural evolution for us, and the perfect excuse to introduce Knix to a whole new generation of readers who already love this world as much as we do."
For Knix, getting the details right was everything. The team translated the world of Prythian into the collection through thoughtful design details, with every piece reviewed line by line by Knix's internal ACOTAR fan club. The goal was to stay true to the books and Maas's vision, right down to the smallest details. The collection features five new silhouettes, each inspired by a different character in the series:
- Satin Corset – channels Nesta's unyielding strength and fire
- Sheer Skirt & Lace Teddy – designed to layer together, recreating Feyre's unforgettable turn in the Court of Nightmares
- Shimmering Robe & Slip Set – brings Feyre's Starfall night to life
- Lace Bodysuit & Sheer Skirt – Elain's quiet power comes through in this piece
- Satin Slips – signature pieces built around Amren's and Morrigan's distinct personas
Alongside these, are five exclusive prints bring the most beloved Courts to life across Knix's signature bras, leakproof underwear, sleepwear and more:
- Spring Court Bloom – feminine florals across bras, underwear and sleep sets capture the romance and renewal of Tamlin's court
- Velaris Night Sky – constellations and drifting stars bring the Night Court's magic to life on satin sleepwear and lingerie, made for reading well past midnight
- Ink That Binds – flowing, tattoo-like linework traces the bond between Feyre and Rhysand across intimates designed to feel as personal as the pairing itself
- Autumn Tapestry and Ember Fox – rich, layered patterns channel the Autumn Court's warmth through cozy loungewear and richly hued lingerie
- Adriata Toile – coastal motifs bring the Summer Court's easy, sun-drenched beauty to swim and everyday essentials
In the lead-up to launch, Knix will build anticipation across social and within its own community with a series of ACOTAR-inspired activations. The celebration kicks off on October 15 with a Consumer Pop-Up at Lavan Chelsea (541 W 25th Street) in NYC, open from 12–8pm. Fans can expect interactive experiences, fandom programming, a musical guest and the chance to shop the collection in person, plus exclusive gifts and prizes available only that day. Knix is also partnering with 30 BookTok creators to bring the collection to life for the community that inspired it, with additional programming and content rolling out in the weeks that follow.
And this is just the beginning. Knix will return to Prythian in January 2027 with a second chapter of the collection inspired by the Spring Court, timed to Maas' A Court Forgotten Melody, Book Seven.
The collection launches exclusively at https://knix.com/acotar on Thursday, October 15. Choose your Court. Choose your fantasy.
About Knix
Knix is an industry leader in redefining intimates through innovation, inclusivity, and a commitment to breaking boundaries. From pioneering Leakproof underwear to revolutionizing wireless and underwire support, Knix challenges convention with thoughtfully engineered designs that blend function, comfort, and style. With a product range spanning bras, swim, activewear, customizable shapewear, and everyday essentials available in an extensive size range, Knix continues to set new standards for how intimates should look, feel, and perform. For more information, visit knix.ca or follow @knix and @ktbyknix on social media.
About Sarah J. Maas
Sarah J. Maas is the internationally bestselling author of the Court of Thorns and Roses, Throne of Glass, and Crescent City Series, captivating millions with her intricate worlds, compelling characters, and masterful blend of romance, action, and adventure. With an astonishing 268 appearances on the New YorkTimes bestseller list, she has cemented her status as one of the most successful authors of the modern era. Her works have sold more than 85 million copies in English and are published in 40 languages, earning her a devoted global fanbase. For more than a decade, her sophisticated fantasy novels have inspired audiences through their exploration of hope, growth and self-love. She is often celebrated for reigniting the genre, even being credited as "a driving force behind the meteoric rise of a whole new subcategory in [fantasy fiction]" (TIME). Also a cultural phenomenon, the TikTok hashtag for her A Court of Thorns and Roses series boasts billions of views. Her latest release, House of Flame and Shadow (January 2024), marked her biggest launch to date, spending 13 weeks on the New York Times bestseller list and breaking records within the fantasy genre.
SOURCE Knix
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