Broadway icon Jason Robert Brown and Marc Kaplan of the downtown venue SubCulture made Broadway fans' dreams come true on June 24, with a special performance at Town Hall benefiting the gun violence prevention organization Brady. Songwriting legend Stephen Sondheim made a rare onstage appearance as the special guest of the evening that also featured Katrina Lenk, Joshua Henry, Shoshana Bean and Rob McClure. Among the concert's highlights was a surprise appearance by Lin-Manuel Miranda, who duetted with Brown on "Franklin Shepard, Inc." from Merrily We Roll Along, and a beautiful moment featuring Sondheim accompanying himself to sing "Good Thing Going" from that fan-favorite musical. Check out photos from the one-of-a-kind benefit below and learn more about Brown's residency at SubCulture here.