And, given even the scant details we have to go on, we're utterly smitten with their thoroughly modern, low-key London celebration.
The bride wore a strapless white unstructured gown, which she accessorised with a statement necklace, fur-trimmed cape and classic Manolo Blahnik embellished pumps.
Her sisters served as bridesmaids, though you wouldn't necessarily know it look at them: the antithesis of trad matchy-matchy maids, they both looked perfectly at ease in dresses that suited their own styles.
Cara opted for a figure-hugging black Burberry sheath with a camel coat thrown casually over her shoulders, while Poppy wore a navy maxi dress with a cropped trophy jacket, both by Chanel, and carried a bag by Jimmy Choo.
After Cara posted on Instagram a no-fuss picture of the happy couple sharing a kiss while signing the register (above), the wedding party hopped into cars and roared off to a celebratory lunch at Mark's Club.
Simple, chic and oh-so now: We ♥.