Atlanta’s Sweetwater 420 Fest has confirmed its initial lineup for 2017, and topping the bill are Widespread Panic and Trey Anastasio Band, who will headline the festival when it returns to Centennial Olympic Park for its 13th year on April 21–23.

Widespread Panic will play two nights for four full sets, while Anastasio’s band will play two sets on one night. Also included in the lineup so far are Slightly Stoopid, Trombone Shorty & Orleans Avenue, Dark Star Orchestra, Anders Osborne, Twiddle, Sister Sparrow & The Dirty Birds and The Hip Abduction.

More headliners and supporting acts will be announced in January 2017, but tickets to 420 Fest are available now at the festival’s website.

Relix is also giving away two passes to the festival. Learn more here.