The first Monday in May is always a feast for the eyes as the world's biggest stars climb the steps of the Met wearing their most flamboyant, outrageous or daring outfits. Hosted in the city that never sleeps, the party doesn't stop when the fundraiser ends.

In fact, it's only beginning.

Various Met Gala after parties took place in Manhattan last night and, of course, there were costume changes. While Kim K slid into some latex and Katy Perry slipped into something a little tastier; Saoirse Ronan found herself a comfy cardi and Michael B Jordan ensured he wouldn't lose his suit by locking himself into it.

Idris Elba and his new wife Sabrina hosted an after party at The Standard’s Top of The Standard in downtown NYC with a guest list that included Benedict Cumberbatch, Donatella Versace, Janelle Monáe, Lizzo, Katy Perry, Michael B Jordan, Gemma Chan, Winnie Harlow, and Gabrielle Union.

A few blocks over, Kim Kardashian and Serena Williams teamed up with Travis Scott, Trevor Noah and Richie Akiva to host an afterparty at a nightclub called Up&Down. They hosted Kendall and Kylie Jenner, Naomi Campbell and Gigi Hadid - to name just a few.

However, the real winner of the night was the Gucci after party, which was held uptown in the gym of Hunter College. Katy Perry arrived in her burger costume, Jared Leto showed off his fake head, Dakota Johnson showed up with her sister, Miley Cyrus posed with her husband Liam Hemsworth. They were all joined by A-list stars including Naomi Campbell, Dua Lipa, Saoirse Ronan, Emma Stone, Karlie Kloss, and the Olsen twins. 

Click through our gallery above to see all the looks from last night's Met Gala after parties.