Becky Lynch won the headline Winner Takes All match at WrestleMania 35 at the first ever all-female main event in WWE's history.
Originally from Limerick, Ireland, she's now both the Raw and Smackdown champion after beating title holders Ronda Rousey and Charlotte Flair.
Ahead of winning she tweeted: "Today is the day when you and me change how this business works."
WWE's biggest show of the year has been described as a game-changer.
Fans have been gripped with the huge rivalry between the three wrestlers over the past year.
During its 35-year history Wrestlemania's main event has seen the likes of The Rock, Hulk Hogan and The Undertaker fight it out for the WWE's top prize.
Known as The Man, the-32-year-old has helped inspire a generation of female wrestlers.
"For so long, the wrestling industry has seen women as second-class citizens," Rihannon Docherty, who wrestles as Rhia O'Reilly, tells Radio 1 Newsbeat.
WWE say this year's WrestleMania grossed $16.9m (£12.9m) breaking the record at New Jersey's MetLife stadium for the highest grossing entertainment event ever.
It also set an attendance record at the venue with a sold-out crowd of 82,265, with WWE claiming fans had travelled from 68 countries.