Orton became a member of the stable Evolution shortly after his WWE debut, which quickly led to an Intercontinental Championship reign, his first title with the company. He also acquired the moniker "The Legend Killer" during a storyline where he began disrespecting and then physically attacking WWE Hall of Famers and wrestling veterans. At age 24, he became the youngest world champion in WWE history after he won the World Heavyweight Championship from Chris Benoit. With this win, he departed from Evolution and a feud with his former stablemates began. In 2006, Orton joined forces with Edge in a tag team known as Rated-RKO. Together, they held the World Tag Team Championship. After Rated-RKO disbanded in mid-2007, Orton gained two WWE Championship reigns in one night, becoming the second youngest two-time WWE Champion at the age of 27. He formed the group The Legacy with Cody Rhodes and Ted DiBiase Jr. in 2008. They disbanded in 2010, and Orton returned to singles competition. From 2013 to 2015, he was aligned with The Authority, who named him the "face of the WWE". In 2016, he joined The Wyatt Family, winning the SmackDown Tag Team Championship with stablemates Bray Wyatt and Luke Harper before turning on them in 2017. He won his first United States Championship in 2018, becoming the 18th overall Grand Slam Champion after already having been the 17th Triple Crown Champion.