PORTLAND — The details of an outdoor concert that is expected to attract more than 12,000 people to Portland’s Eastern Promenade this summer will be discussed at the Munjoy Hill Neighborhood Organization’s annual meeting Thursday night.

Tickets for the Aug. 4 music festival and concert featuring the critically acclaimed British folk rock band Mumford & Sons sold out in 25 minutes when they went on sale June 1.

Representatives from the city and the State Theater, which is promoting the Mumford & Sons’ concert, have been invited to Thursday’s meeting, according to a press release issued Wednesday by the neighborhood group.

Those representatives will provide more information about the event to Munjoy Hill residents and be available to answer questions. The meeting is scheduled to start at 6 p.m. in the East End Community School on North Street.

According to the current festival schedule, which the neighborhood group released, gates will open at noon, with music beginning at 2 p.m. and ending at 9 p.m.

Several bands will perform during the festival, with Mumford & Sons highlighting the daylong celebration.

No chairs will be allowed inside the concert site – the hillside overlooking East End Beach – which will be enclosed by a security fence. People will have to stand or sit on blankets.

Concert goers will be encouraged to park in the Old Port and walk, bike or take the Maine Narrow Gauge Railroad to the festival.

A portion of the proceeds from the concert will benefit Friends of the Eastern Promenade. Both organizations have submitted letters of support for the festival.

Portland was just one of four sites in the United States selected to host Mumford & Sons’ Gentlemen of the Road Stopovers tour.

The Portland City Council approved the show in April after the idea was proposed by local promoter Lauren Wayne, who is general manager of the State Theater.