Sometimes a classic LBD truly steals the show.

Sarah Jessica Parker stepped out with her family for the opening night of the revival of “Other Desert Cities” in Manhattan on Sunday. The fashion icon opted for a chic all-black ensemble — including Reformation’s under-$300 Maribel dress, which is surprisingly still in stock.

The “Sex and The City” star paired it with a pendant necklace, heels and a cool-weather-ready shrug, showcasing the sleek style’s versatility.

In addition to fun details like a tone-on-tone print and fringe hem, the midi style has a straight neckline, adjustable straps and a slit in the back. (For a winter-ready outfit, it would even look incredibly chic paired with the brand’s Alden Cashmere Poncho.)

Made of deadstock fabric, the timeless design is available in sizes 0-12 and also comes in a champagne-taupe hue, which is already showing as low stock.

SJP is known for her impeccable style picks, from skinny jeans to Carrie Bradshaw-worthy designer duds.

While the multi-hyphenate entrepreneur proved the Maribel Dress is the perfect ‘fit for date nights or outings, it also has endless possibilities for holiday parties and occasions.

Reformation is a celeb go-to, spotted on the likes of Taylor Swift, Jennifer Aniston, Jessica Alba and Meghan Markle.

Known for its elevated essentials and gorgeous dresses, the eco-conscious label has collaborated with Alexa Chung, Hoka, Nara Smith and, memorably, Monica Lewisnksy.

Once spotted on an A-lister, these styles have a way of flying off shelves — so shop the Maribel while sizes are still in stock.