In 2018, Rousey began a career in professional wrestling, signing a contract with WWE. She made her first appearance at the 2018 Royal Rumble. She debuted at WrestleMania 34, and later won the Raw Women's Championship, her first WWE and professional wrestling title, at SummerSlam. She then headlined the inaugural WWE all-women's pay-per-view event when she successfully defended her title at WWE Evolution. Rousey lost her title in the first-ever women's WrestleMania main-event in a triple threat match at WrestleMania 35; this left her reign as Raw Women's Champion as the second-longest in the title's history at 231 days.