Tonight, Global Citizen will hold The World On Stage concert at the NYU Skirball Center in New York for a night that will feature headliners Tom Morello of Rage Against the Machine and Prophets of Rage and Jon Batiste and Stay Human, and now it appears that Morello will be hosting a special collaboration with fellow guitarist Warren Haynes.

Haynes posted the above picture of himself and Morello on his Instagram, captioning it with “Rehearsing with Tom Morello for tonight’s Global Citizen World On Stage performance.”

Global Citizen is an organization founded in 2012 that seeks to create a worldwide community dedicated to ending extreme poverty by 2030. More information on tonight’s New York show is available here.