The 34-year-old actress shared a clip on her social media accounts in which she and the "Wolverine" star are seen hanging out together at the backstage.
"Backstage madness @RealHughJackman @Deborra_lee," she captioned the video.
Jackman, 47, also expressed his excitement for the festival on the micro-blogging site.
"Always an awesome festival! Five years and counting.
@Hughcevans and the ENTIRE TEAM @GlblCtzn thank you. You are the best," he wrote.
The festival which happened last evening at Central Park in New York City, witnessed R&B singer Rihanna, rapper Kendrick Lamar, Electronic band Major Lazer and Metallica.
Coldplay frontman Chris Martin, Pearl Jam lead vocalist Eddie Vedder, DJ Usher and singer Ellie Goulding also attended the concert as special guest appearances.
Martin and Priyanka shared the stage to talk about his band's upcoming maiden concert in India as a part of the Global Citizen Festival.
Last Updated 6:44 PM IST