A terrific mix of classic and contemporary artists and genres, from hip-hop and indie rock to Americana and dance pop, will be featured at the late-summer edition of the music festival known as Boston Calling. Crash Line Productions will announce Wednesday that the three-day event at City Hall Plaza, slated for Sept. 5-7, will include critically-acclaimed rockers the National, teen pop phenom Lorde, and — color us impressed — the reunited Replacements. Also on the bill will be the Roots, playing a set of their own and collaborating with rapper Nas, indie darlings Neutral Milk Hotel, rapper Childish Gambino (the hip-hop alter ego of actor Donald Glover), rockers the Hold Steady, excitable mash-up artist Girl Talk, the up-and-coming Lake Street Dive, and Boston’s own pop purveyors Gentleman Hall. Not bad, eh? The reconstituted Replacements, fronted by the mercurial Paul Westerberg and bassist Tommy Stinson, now include guitarist Dave Minehan of the undersung Boston band the Neighborhoods. (Original drummer Chris Mars isn’t taking part in the reunion, and guitarist Slim Dunlap is recovering from a stroke.) Westerberg’s manager, Darren Hill, said the band has been invited to play at every major festival, but is only playing a few. “The Replacements always had an affinity, a really strong connection, to Boston and the Boston scene,” said Hill, who’s headquartered in Rhode Island. “I’m sure you can expect a surprise in Boston.” For a full list of artists go to www.bostoncalling.com. Presale tickets for the September shows go on sale Thursday through ticketmaster.com. Three-day general admission passes are $150 and VIP passes are $250. The spring edition of Boston Calling, featuring the Decemberists, Jack Johnson, Death Cab for Cutie, and more, takes place at City Hall Plaza May 23-25.