Jennifer Hartswick, singer and trumpeter for Trey Anastasio Band, and Jeff Coffin, saxophonist for Dave Matthews Band, have formed the new Hartswick/Coffin Project, which will play on December 11 at Atlanta’s City Winery.

“This is gonna be all KINDS of fun!” Hartswick posted on her Facebook. “I love this man and he is a monstrous genius and I have butterflies when I get to make music next to him.”

Tickets to the City Winery show are available here.