Billie Eilish, Stevie Nicks, Miley Cyrus and more acts have been announced to top the bill at this year’s Austin City Limits (ACL).As is the case with its sister festival Lollapalooza in Illinois, Austin City Limits is returning with a full capacity two-weekend event later this year. ACL marks its 20th anniversary this October 1-3 and October 8-10 at Zilker Park in Austin, Texas.Joining Eilish, Nicks and Cyrus on the line-up are Erykah Badu, Megan Thee Stallion, St.