One of the best celebrations of cutting-edge music in the U.S., the Pitchfork Music Festival will return to Union Park for its fourth summer on July 18-20.

Promoters announced a partial list of acts Monday, including hip-hop legends Public Enemy performing their classic album “It Takes a Nation of Millions to Hold Us Back,” the much-hyped indie jam band Animal Collective, psychedelic hypnotists Spiritualized and the hyperbolic and difficult to pronounce !!!.

Other performers include M. Ward, Boris, Vampire Weekend, Dizzee Rascal, No Age, Atlas Sound, Fleet Foxes, Extra Golden and El Guincho, “plus more than two dozen other acts still to be announced.”

Tickets go on sale Wednesday at noon via www.pitchforkmusicfestival.com at a cost of $30 per day, with a limited number of two-day passes for $50 and three-day passes for $65.