This article marks the 79th birthday of Jeff Hanna, born in Detroit, Michigan, on 11 July 1947, and celebrates his role as a founding member of the country-rock group the Nitty Gritty Dirt Band. It highlights his significance in roots music, particularly through the band's landmark 1972 album Will the Circle Be Unbroken, which brought together revered old-time, bluegrass and Grand Ole Opry artists and helped introduce them to a younger generation of listeners.

Hanna formed the band in Southern California after his family relocated from Colorado when he was 15, meeting future bandmate Bruce Kunkel and other folk-loving musicians. The group released its debut single, "Buy for Me the Rain," in 1967, scored its first top 10 hit with "Mr. Bojangles" in 1969, and enjoyed a run of 1980s successes including "Fishin' in the Dark." Beyond the band, Hanna has worked as a session musician and songwriter with artists such as Emmylou Harris, Linda Ronstadt and Johnny Cash, and co-wrote "Bless the Broken Road," whose Rascal Flatts cover won a Grammy for Best Country Song. He has been married to singer-songwriter Matraca Berg since 1993.