It has seen social media users fashion their bedding - specifically pillows - into makeshift “minidresses” at home, kept in place with a belt around the waist.
Celerities including Halle Berry, Nadia Sawalha and Tori Spelling have joined bloggers in getting creative with their bedroom interiors.
Now, Tracee Ellis Ross has joined their ranks with her own attempt - and people are hailing it as the “chicest” one yet.
In an Instagram post, the actress, 47, shared a picture of her covered up with just a cream pillowcase - fastened by a slim tan belt.
The American star posed while perched on a wooden desk for the image, beside two large indoor plants in front of a window.
Captioning the photo, she wrote: “Am I too late? #pillowchallenge.”
Her post delighted her followers, who left more than 380,000 ‘likes’.
One person wrote: “The chicest one.”
Another commented: “YEEES GAWDD!”
A third shared: “Quarantine but make it fashion!”
And a fourth added: “This could be a Vogue cover.”
It comes as Halle Berry joined in on the viral trend with a twist on the classic ‘little black dress’.
In an Instagram post, the actress, 53, posed in her leafy garden, and accessorised her black pillow with wide-rimmed hat, sunglasses and a pair of heels.
Similarly, Loose Women panellist Nadia Sawalha, 55, took direct inspiration from the Hollywood star with a white pillow and red heels - leaving her Instagram fans in stitches.
Actress Tori Spelling has also given the comfy trend a go, but wore more a few more clothes for her post.
It comes as women joining in on the challenge had fun accessorising their DIY looks with quarantine-friendly eye-masks and slippers, as well as designer handbags, heels and sunglasses.
The trend has also provided ample opportunity for social media users to show off their chic duvet sets, including everything from classic white to fluffy green.
One of the first proponents of the viral fashion challenge was Swedish fashion blogger Gergana Ivanova, who runs the account @myforteisfashion.
She paired her lilac Ikea pillowcase with a Zara belt, New Balance trainers and a PrettyLittleThing handbag.
Her post has received more than 60,000 ‘likes’ and more than 1,000 comments.
Another participant was British fashion blogger Sophie Milner, who matched her white pillow with a Chanel bum bag and sandals in a post on her account.
Similarly, the Canadian-based blogger behind @allthingsmieza showed off her fluffy pink pillow ensemble plus heart-shaped glasses.