When your bestie is as stylish as Emily Ratajkowski, you know she can be trusted to pick out the perfect dress for any occasion. Even on your wedding day. This was the cast last week when the model and podcast host attended the New York City nuptials of BFF Katherine Mendenhall and Marcos Alvarado. Sporting a simple floor-length black gown with a square neckline, a voluminous ’90s blowout, and rectangular sunglasses, EmRata was no doubt on the event’s best-dressed list.

It’s the simplicity that makes the little or long black dress a perfect choice for weddings year round, whether you’re close to the couple or joining the festivities as a plus one. It’s classic without being too revealing, but also provides a neutral palette for having fun with accessories — even if you aren’t carrying a super cute flower boy down the aisle.