Photos: Mayweather, McGregor - HUGE LA Conference Gallery

A worldwide audience will witness a one-of-a-kind sporting event when legendary boxer and pound-for-pound king Floyd "Money" Mayweather returns to the ring to battle all-time MMA great and UFC champion "The Notorious" Conor McGregor in a 12-round boxing match. The fight announcement on June 14 captured the world's attention as fans across the globe anticipate the outcome of this once-in-a-lifetime showdown taking place Saturday, Aug. 26 at T-Mobile Arena in Las Vegas.  The event will be produced and distributed live by SHOWTIME PPV and promoted by Mayweather Promotions.

A 12-time world champion in five weight classes, the 40-year-old Mayweather retired undefeated in September 2015 as one of the greatest to ever step in the ring, buoyed by box office success that saw him shatter nearly all of the revenue records in the sport's history. Now, he returns to challenge the bold, powerful and popular McGregor, whose elite striking skills put him in the record books as the first athlete to hold two UFC titles simultaneously, all while soaring to the mantle of the sport's No. 1 PPV attraction at only 28 years old.

Mayweather and McGregor will meet in a super welterweight contest (154-pound limit), serving as the first time champions from boxing and MMA will meet in a sanctioned boxing match.

Stephen Espinoza, Executive Vice President and General Manager, SHOWTIME Sports, said, "We are proud to reunite with Floyd Mayweather, Mayweather Promotions and the MGM Grand to deliver this unprecedented global event. Never before, in the vast experience of SHOWTIME PPV which includes worldwide events featuring record-setting events with Mike Tyson, Julio Cesar Chavez and Floyd Mayweather, have we experienced a reaction like we have to Mayweather vs. McGregor. 

Both Floyd and Conor are trend-setting personalities who have transcended their respective sports.  They carry unmatched reputations for spectacle and athleticism, and together they create a truly can't-miss event."

Dana White, President of UFC said, "My goal has always been to put on the greatest fights the world has ever seen, whether they take place inside an Octagon or a boxing ring. Floyd Mayweather is one of the best fighters of all-time but he has never faced someone like Conor McGregor. Throughout his UFC career, Conor has proven that he should never be underestimated and I believe this will be no different. On August 26th, we will see the biggest fight in history.

The world will be watching to see if Conor can follow through on another promise and make history once more. No matter the outcome, this will be a historic night in sports and we are honored to give the fans what they have been asking for."

Richard Sturm, president of entertainment and sports for MGM Resorts International, said, "It is an honor to have the opportunity to host the Floyd Mayweather vs. Conor McGregor fight at T-Mobile Arena, our industry's leading venue for major sports and entertainment. Las Vegas is known for its summer heat but nothing will be hotter than this championship event on August 26."

One of the most decorated fighters in the history of the sport, Mayweather, of Grand Rapids, Mich., and fighting out of Las Vegas, used his trademark speed, defensive prowess and ring generalship on his way to 24 triumphs over world champions during his illustrious career.  Among those 24 victories are the biggest names in the sport, past and present, including Manny Pacquiao, Oscar De La Hoya, Miguel Cotto, Canelo Alvarez, Shane Mosley, Juan Manuel Marquez, Zab Judah and Arturo Gatti.

In addition to his in-ring accomplishments, Forbes, Fortune and Sports Illustrated have all named Mayweather the world's highest paid athlete multiple times. His events amass record-breaking numbers; he has headlined four of the six highest-grossing pay-per-view events of all-time and holds the all-time record in gross pay-per-view receipts.  His 2015 showdown with Pacquaio shattered the all-time pay-per-view television record with 4.6 million buys while the event grossed a staggering total of more than $600 million.

Mayweather, the only fighter to have headlined three events that each generated more than 2 million pay-per-view buys, has garnered numerous "Fighter of the Year" awards over his storied career, including five ESPY Awards and two Boxing Writers Association of America awards.

Representing his hometown of Dublin, Ireland, McGregor's larger than life personality and devastating power have helped him become his sport's No. 1 attraction. He became the first MMA fighter to crack Forbes highest-paid athlete list in 2016 and was even higher on the list in 2017.

He became the undisputed UFC featherweight world champion by delivering pinpoint left handed shots that quickly ended the nights of top fighters Jose Aldo and Chad Mendes. McGregor then moved up in weight for a pair of blockbuster matchups with Nate Diaz that saw him set a new mark for UFC pay-per-view buys when he defeated Diaz in the rematch last August.

After dispatching Diaz, McGregor set his sights on history as he headlined at Madison Square Garden against lightweight champion Eddie Alvarez. McGregor put on a striking clinic against Alvarez knocking him down five times before getting the second round knockout and adding the lightweight title to his featherweight world title, becoming the first UFC fighter to ever hold two belts concurrently.