This evening, non-profit group Global Citizen will host The World On Stage, an event that will bring together world leaders, global activists, and some of the world’s greatest artists for an evening to celebrate the impact achieved by millions of Global Citizens, featuring incredible music, powerful stories, and discussions about bold solutions to end extreme poverty. The event, to be held at NYU Skirball Center in New York City, will feature performances by Tom MorelloWarren Haynes and more.

Today, Haynes posted a photo of himself and Morello rehearsing together for tonight.

The photo has caused excitement among fans, as it appears The World On Stage‘s audience will feature a collaboration between the two artists. The lineup also includes Jon Batiste and Stay HumanKeshaRegina SpektorAloe Blacc & Maya Jupiter, and more.