Phillip Jack "Phil" Brooks (born October 26, 1978), better known by the ring name CM Punk, is an American comic book writer, actor, retired professional wrestler, and forthcoming mixed martial artist, who is signed with the Ultimate Fighting Championship (UFC) as of February 2016. He is best known for his time in WWE, where he was the longest-reigning WWE Champion of the modern era, having held the title for 434 days from November 20, 2011 to January 27, 2013. His reign is officially recognized as the sixth longest of all time, as well as the longest since 1988.

Brooks began his professional wrestling career on the American independent circuit, primarily with Ring of Honor (ROH) until 2005 when he signed with World Wrestling Entertainment (WWE). He is a seven-time world champion in professional wrestling: having won the WWE Championship twice, WWE World Heavyweight Championship three times, ECW Championship once and ROH World Championship once. Along with Daniel Bryan and Seth Rollins, he is one of three men to have been world champion in both WWE and ROH. Punk is also a one-time World Tag Team Champion (with Kofi Kingston), and one-time Intercontinental Champion, making him the 19th WWE Triple Crown Champion and the fastest man in WWE history to achieve this feat, doing so in 203 days. In addition, he was the 2011 WWE Superstar of the Year and the first two-time Money in the Bank winner.