From left: Mike Tyson, Joan Rivers, Kim Kardashian, Lindsay Lohan, Sarah Jessica Parker, Tracy Morgan and Lady Gaga
Courtesy Kim Kardashian
02/18/2014 at 08:00 AM EST
The stars came out to support Jimmy Fallon
for his Tonight Show debut
on Monday, and it made for some fun photos backstage at Studio 6B in Rockefeller Center.
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.
In one photo,
Kardashian posed with Mike Tyson, Joan Rivers, Lindsay Lohan
, Sarah Jessica Parker
, Tracy Morgan and Lady Gaga
. In another,
she appeared with Morgan and Seth Rogen.
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.