Lily Collins has spent the past few days exploring San Miguel in Mexico, posting photos of the colorful flag and flower-laden streets, the architecture, Day of the Dead decorations and, of course, a few holiday ‘fit pics for good measure.

The Emily in Paris actress, who is in the city with her husband, director Charlie McDowell, for a friend’s wedding, has been dressing in printed, balloon-sleeved maxis with sneakers, changing into black dresses with loafers and blazers for nighttime. But instead of the usual Reformation-type wedding guest look you’d expect, Collins opted to wear something a little different for the nuptials.

Posting a photo dump from the day, the 33-year-old showed her look, which consisted of a pair of simple black cigarette trousers and a high-neck black top under a white blazer. In a very Emily Cooper addition, Collins added a statement Chanel brooch. She wore simple white flats on her feet in lieu of heels with pearl earrings, a Chanel flap bag and wore her hair pulled back with a black bow.

Collins is just the latest celebrity to buck tradition when it comes to wedding guest dressing. Dua Lipa wore a see-through dress to her friend Simon Porte Jacquemus’ wedding in France earlier this year (that was created by the groom himself, so you know it was pre-approved) and, famously, Kendall Jenner wore the Monôt cutout dress to end all cutout dresses at her friend Lauren Perez’s wedding last year. After much backlash, she later revealed via Instagram comments that her look was pre-approved by the bride, too.

Though Collins went far less risky and skin-baring with her look, we’re sitting happy in the knowledge that flats and trousers are confirmed as being wedding-appropriate. Cozy!