The most prized combative sports showdown of the past two decades, expected to break all PPV records — is on.

Floyd Mayweather Jr relayed on his “Shots” social media account that he has signed to face longtime rival Manny Pacquiao, on May 2 at the MGM Grand in Las Vegas, Nevada.

“What the world has been waiting for has arrived,” Mayweather posted, along with a picture of the signed contract. “We will make history on May 2. Don’t miss it!”

“I am very happy that Floyd Mayweather and I can give the fans the fight they have wanted for so many years,” said Pacquiao, as quoted in a report by Kevin Iole of Yahoo! Sports.

Iole reports that Mayweather will enjoy a 60-40 split advantage on revenues, with Mayweather making at least $120 million and Pacquiao $80 million.

The bout has been anticipated for about six years. In previous years, the two fighters enjoyed a 1-2 position at the top of boxing’s pound-for-pound rankings; and they remain the sport’s biggest attractions.

According to ESPN’s Sports Center, Pacquaio, who has accumulated a 57-5-2 record, has opened as a -275 underdog — perhaps due to two recent losses, one by a controversial decision, the other by knockout. He has scored world titles in eight weight classes.

Mayweather remains undefeated as a professional with a 47-0 record. He has won world titles at five different weight divisions, and also scored a bronze medal at the Atlanta Olympics in 1996. His bout with Oscar De La Hoya in 2007 holds the all-time record for PPV buys at 2.4 million.

The fight will be held at the 147 lb limit, where both have been campaigning in recent years.