Royal Rumble (2018) was a professional wrestling pay-per-view (PPV) event and WWE Network event produced by WWE featuring wrestlers primarily from the Raw and SmackDown brands, as well as surprise appearances from competitors on the NXT brand. It took place on January 28, 2018, at the Wells Fargo Center in Philadelphia, Pennsylvania. It was the thirty-first event under the Royal Rumble chronology, the first to include a women's Royal Rumble match, and consequently, two Royal Rumble matches.
Nine matches were contested at the event, including three on the pre-show. In the main event, Asuka won the first-ever women's Royal Rumble match, which was also the second women's match to main event a WWE pay-per-view, and the first to main event one of WWE's "Big Four" pay-per-views. The men's Royal Rumble match was won by Shinsuke Nakamura. Other prominent matches included Brock Lesnar retaining the Universal Championship in a triple threat match against Braun Strowman and Kane, and AJ Styles retained the WWE Championship against Kevin Owens and Sami Zayn in a handicap match. The event was also notable for the surprise appearance of former UFC star Ronda Rousey following the women's match, officially confirming that she had signed full-time with WWE.