The photo was taken in the bathroom and shared on Eilish's Instagram Story. In the snapshot, the 21-year-old singer looked stunning in a black dress, while her three friends donned white dresses. Hawke even stuck out her tongue in the picture.
Eilish appeared to be poking fun at the event's strict rules by including the no smoking emoji in her caption, referencing the "No smoking, no vaping" sign on the bathroom mirror.
It's worth noting that selfies were not allowed at the Met Gala, and the use of social media was banned to prevent celebrities from spending too much time on their phones during the event.
While some of Eilish's fans enjoyed the photo, others criticized her for not following the rules. Nonetheless, Eilish looked beautiful in the snapshot, and her fans were thrilled to see her having fun with her friends at the prestigious fashion event.