The event, to be held at Goose Creek in East Hampton, is sponsored by THR and Samsung Galaxy S III.
End of Watch stars Gyllenhaal and Michael Pena as young police officers who patrol the meanest streets of south central Los Angeles. The action unfolds entirely through footage from the handheld HD cameras of the police officers, gang members, surveillance cameras and citizens.
Cody Horn, America Ferrera and Anna Kendrick also star in the movie, which was written and directed by David Ayer.
End of Watch, from Open Road Films, hits theaters Sept. 21.