Showtime Sports Documentary Films has released the official trailer and poster art for the upcoming documentary THE KINGS, a four-part series chronicling the fierce rivalry between world champions and Boxing Hall of Famers known as the “Four Kings” – Roberto “Manos de Piedra” Durán, Marvelous Marvin Hagler, Thomas “The Hitman” Hearns, and Sugar Ray Leonard. Premiering Sunday, June 6 at 8 p.m. ET/PT on SHOWTIME, the series chronicles the four fighters' dramatic and divergent ascents to greatness and the legendary matches they produced.

THE KINGS spotlights boxing's evolution from the end of Muhammad Ali's era to the era of the Four Kings, set against the seismic political and socio-economic shifts taking place in the United States. The Four Kings rose to fame as the presidency of Jimmy Carter and economic recession gave way to the boon of 1980s capitalism and excess harnessed by the administrations of Ronald Reagan and George H.W. Bush. Through in-depth interviews and archival footage, the series also examines the very personal battles that each man waged on his unique journey to the center of the sports world.

THE KINGS is produced by Box To Box Film in association with Ingenious Media. The series is executive produced by James Gay-Rees (Amy, Senna, Drive To Survive) and Paul Martin (Diego Maradona, Drive To Survive), produced by Fiona Neilson (Oasis: Supersonic, Coldplay: A Head Full of Dreams) and directed by Mat Whitecross (Oasis: Supersonic, Road To Guantanamo, Coldplay: A Head Full of Dreams).