Vanessa Hudgens & Jimmy Fallon Promise 'I'll Be There for You' With 'Friends' Duet

Vanessa Hudgens, 2015
Mike Coppola/Getty Images for Tony Awards Productions

Vanessa Hudgens attends the 2015 Tony Awards at Radio City Music Hall on June 7, 2015 in New York City.  

Vanessa Hudgens and Jimmy Fallon aren't just acquaintances or colleagues, they're friends. And the two put their relationship on full display Monday night by dueting the Friends theme song. 

The former Disney Channel star joined The Tonight Show with Fallon to promote her new show Powerless when conversation turned to NBC's historic lineups of exceptional comedy on Thursday nights. After Seinfeld and Cheers got their nods, Friends came up and the two seamlessly segued into a pretty touching moment. 

"We're family and we're... friends," Fallon told Hudgens, before the intro guitar line to the The Rembrandts' popular song "I'll Be There For You" started up.