Ziggy Marley and Warren Haynes Band have joined the lineup for the New Orleans Jazz & Heritage Festival. Both acts will replace marquee acts who recently dropped out of the fest: Marley will replace his father’s onetime bandmate Bunny Wailer while Haynes and his solo group will fill in for Levon Helm Band with special guest Mavis Staples. New Orleans paper The Times-Picayune first confirmed the news earlier this afternoon.

Helm canceled a series of upcoming shows, leading many fans to worry about his health. While Helm is believed to be ailing, the exact nature of his health issues are not known.