The Hollywood couple parted ways in December (10) after two years of marriage, but the stars have remained friends and have met up for dinner on more than one occasion in the months since their split.
And the former spouses were back in each other's company on Thursday as they watched the Creep hitmakers perform at Manhattan's Roseland Ballroom.
A source tells UsMagazine.com, "Ryan and Scarlett came in together right before show started and just watched, rocked out and left together. They just seemed like good friends."
Johansson and Reynolds weren't the only celebrities who turned out to see the British band live - Gossip Girl beauty Blake Lively, comedian Jack Black and newlywed couple Daniel Craig and Rachel Weisz were also in attendance.