The Lockn’ Festival has announced that Tom Petty & The Heartbreakers will headline one night at this year’s event. The band—who will release their new album Hypnotic Eye later this summer—join a lineup that already includes The Allman Brothers Band, Phil Lesh & Friends, Bob Weir & RatDog, Widespread Panic, The String Cheese Incident, Wilco and more. Many of the above artists are slated to perform on multiple nights, and Widespread Panic will be joined by Steve Winwood during one of their sets.

Lockn’ has expanded 2014 its lineup over the past few weeks with additions such as Tedeschi Trucks Band, Umphrey’s McGee, Drive-By Truckers, Grace Potter & the Nocturnals, Gary Clark Jr., Willie Nelson, Chris Robinson Brotherhood, Hot Tuna Acoustic, The Wood Brothers, Cabinet and Bustle in Your Hedgerow featuring Joe Russo, Marco Benevento, Dave Dreiwitz and Scott Metzger.

Additionally, Lockn’ also recently confirmed that Warren Haynes, John Scofield, John Medeski and Joe Russo will join Phil Lesh for his Friends shows at this year’s festival.

Lockn’ Festival will return to Arrington, VA this September 4-7. General Admission tickets as well as VIP options are available via the festival’s website.