For those out there already plotting ways to recreate the ensemble, you're in luck.
In a turn of events rare in the A-list bubble, the bra-rollneck combo is available to shop from your local store.
Of course, we have Holmes to thank for the trend making social media waves this season with a catalogue of screenshots depicting the actress tackling the school run with enviable ease saved on our phone.
But the newly-knighted fashion power player had no idea that she would be thrust into 'muse' status after simply chucking on the "easy" look.
"It was very comfortable and easy and I think they [Khaite] do such a good job with creating beautiful luxury items," the 40-year-old told Vogue. "They are very accessible and classic so you can have it for a long time and I like to shop that way. I'm not always buying new stuff and I can wear it again."
Ever since the soon-to-make-the-fashion-history-books outfit broke our Instagram feed, Holmes has continued to inspire our next shopping trip.
Giving a whole new meaning to post-break-up dressing, the newly-titled fashion darling has been photographed in a series of high fashion ensembles carrying her from the front row to the red carpet in one headline-worthy swoop.