On April 28, 2015, “Big Machine Records” label released “Jekyll + Hyde”, the fourth Zac Brown Band studio album. It was recorded in 2015, and was produced by Zac Brown, CeeLo Green, Jim Hoke, In the Arena Production, Jay Joyce and Darrell Scott.

Personnel:

• Zac Brown – lead vocals, acoustic and electric guitar, banjo, programming
• Coy Bowles – electric guitar, slide guitar, resonator guitar, Hammond organ, Wurlitzer electric piano
• John Driskell Hopkins – baritone guitar, acoustic and electric guitar, banjo, ukulele, backing vocals
• Clay Cook – piano, keyboards, electric guitar, pedal steel guitar, National guitar, ukulele, Mellotron, Hammond organ, clavinet, Fender Rhodes, Wurlitzer electric piano, glockenspiel, backing vocals
• Matt Mangano – acoustic bass guitar, bass guitar, upright bass, acoustic guitar, electric guitar
• Chris Fryar – drums
• Daniel de los Reyes – percussion
• Jimmy De Martini – violin, fiddle, strings, cello, acoustic guitar, backing vocals
• Darrell Scott – acoustic guitar and electric guitar, banjo, pedal steel guitar, acoustic stringed instrument, piano, backing vocals
• Donald Dunlavey – electric guitar
• Béla Fleck – banjo
• Mickey Raphael – harmonica 
• Byron House – upright bass
• Jay Joyce – percussion, programming
• Jim Hoke – tenor saxophone, flute 
• Randy Leago – baritone saxophone
• Ben Simonetti – trumpet, programming
• Steve Herrmann – trumpet
• John Hinchey – trumpet
• Vinnie Ciesleski – trumpet 
• Barry Green – trombone 
• Michael McGoldrick – Uileann pipes, Irish flute, pennywhistle
• Chris Cornell – duet vocals
• Sara Bareilles – duet vocals
• Jewel – backing vocals
• Darrell Scott, Maureen Murphy, Sarah Dugas, John Cowan, Odessa Settles, Rick Jones, Jason Eskridge – choir
• Niko Moon – programming, backing vocals
• Nicholas Fournier – engineer
• Kyle Lehning – engineer
• Sean Phelan – engineer
• Anthony Ruotolo – engineer
• Martin Cooke – engineer
• Paul Cossette – engineer
• Kyle Stevens – engineer
• Tom Syrowski – enginer
• Brandon Bell – engineer, mixing
• Jason Hall – engineer, mixing
• Ben Simonetti – engineer, mixing
• Jay Joyce – mixing
• Rich Costey – mixing
• Andrew Scheps – mixing
• Mario Borgatta – mixing assistant
• Chris Bellman – mastering 

Track listing:

1. Beautiful Drug – Zac Brown, Niko Moon
2. Loving You Easy – Zac Brown, Niko Moon, Al Anderson
3. Remedy – Zac Brown, Niko Moon, Wyatt Durrette, Keb’ Mo
4. Homegrown – Zac Brown, Niko Moon, Wyatt Durrette
5. Mango Tree – Zac Brown, Niko Moon, Anna Harwood
6. Heavy is the Head – Zac Brown, Niko Moon, Wyatt Durrette, John Driskell Hopkins, Jimmy De Martini, Darrell Scott
7. Bittersweet – Zac Brown, Niko Moon, Wyatt Durrette
8. Castaway – Zac Brown, Niko Moon, Wyatt Durrette, Coy Bowles, John Driskell Hopkins
9. Tomorrow Never Comes – Zac Brown, Niko Moon, Wyatt Durrette
10. One Day – Zac Brown, Wyatt Durrette, Rich Robinson, Sarah Dugas, Christian Dugas, Matt Mangano
11. Dress Blues – Jason Isbell
12. Young and Wild – Zac Brown, Niko Moon, Wyatt Durrette, Amos Lee, Coy Bowles
13. Junkyard (contains elements of Is There Anybody Out There? by Pink Floyd) – Zac Brown, Roger Waters
14. I’ll Be Your Man (Song for a Daughter) – Zac Brown, Niko Moon, Wyatt Durrette, Coy Bowles, John Driskell Hopkins, Darrell Scott
15. Wildfire – Zac Brown, Eric Church, Wyatt Durrette, Liz Rose, Clay Cook
16. Tomorrow Never Comes (acoustic version) – Zac Brown, Niko Moon, Wyatt Durrette