For Liya Kebede, Sunday night marked a number of firsts. For one, it was the model and activist’s first time attending the Oscars. Kebede arrived on the arm of her partner Philippe Rousselet, a producer on the Best Picture winner CODA, which became the first movie with a majority of deaf actors in the cast to win the top trophy. It was also the first Oscars outing for the designer behind her dress, Pieter Mulier, who took over at the storied French fashion house of Alaïa early last year. Already worn by the likes of Zendaya and Alexa Demie, his designs have quickly become a red carpet favorite.