A four-CD box set of unreleased music by Tom Petty and the Heartbreakers is set to be released.
"An American Treasure" is the first posthumous musical project since Petty died of an accidental overdose in October.
The set will include 60 previously unreleased studio and live recordings, deep cuts and more.
On Tueday, SiriusXM debuted a portion of one of the songs, "Keep a Little Soul," on its Tom Petty channel.
Petty and his longtime band climbed to fame for their brand of sturdy, heartland rock.
Tom Petty and the Heartbreakers were inducted into the Rock and Roll Hall of Fame in 2002.
"An American Treasure" is set to be released September 28.