Celebs Arrive for Met Gala 2021

The Met Gala is back after a year off due to COVID, and it looks like the stars were chomping at the bit to put on their best suits and dresses in a return to normalcy.

This year's hosts include Keke Palmer, Billie Eilish, Amanda Gorman, Timothee Chalamet and Naomi Osaka -- and they've already arrived in with their own getups ... which were eye-popping and extravagant.

Some of the stars expected to show include Rihanna, J Lo, Kim K, Emily Ratajkowski, Camila Cabello, Lupita N'yongo, Beyonce, Addison Rae and more. This year's theme is "In America: A Lexicon of Fashion" -- so we'll see wears to rep that.

We know what you're thinking ... what about the Delta variant? There are strict protocols in…