updated 02/18/2014 AT 8:00 AM ET
•originally published 02/18/2014 AT 8:45 AM ET
Kim Kardashian posted a few of them to Instagram, posing with a parade of celebs who walked out to congratulate Fallon, 39, on his first night hosting the iconic NBC show.
Will Smith was Fallon’s first guest. He and musical guests U2 kicked the show into high gear after a sentimental opening monologue from Fallon.
Gaga will be among the guests on Tuesday’s show, joined by Jerry Seinfeld and Kristen Wiig.