Zac Brown Band has been announced as a headliner for Summerfest 2027. This makes them the first announced headliner for the event. Further information about the announcement can be found through WTMJ.

Details about the event, such as the full lineup and schedule, may also be available from this source. At this time, only the announcement of Zac Brown Band as the first headliner has been shared. For more information, readers can refer to the source publication, WTMJ.