Bret Sergeant Hart (born July 2, 1957) is a Canadian (Canada) on-screen personality (Celebrity), writer and retired professional (Professional wrestling) and amateur wrestler (Amateur wrestling) currently signed to World Wrestling Entertainment (WWE), appearing as the General Manager (Professional wrestling authority figures#Raw brand authorities) of the Raw (WWE Raw) brand (WWE brand extension). Throughout his professional wrestling career, he wrestled under the persona of Bret "Hit Man" Hart. He is also known by the monikers "The Pink and Black Attack", in reference to his ring attire, and "The Excellence of Execution." He is a member of the Hart wrestling family.

Following success in amateur wrestling tournaments in high school and throughout Calgary, Hart debuted in professional wrestling in 1976 with his father, WWE Hall of Famer Stu Harts promotion, Stampede Wrestling. In 1984, he signed with the World Wrestling Federation (WWF; now WWE) and was soon paired with future brother-in-law Jim Neidhart to form the successful (List of World Tag Team Champions (WWE)) tag team The Hart Foundation, while also enjoying a singles career. When WWF management separated the team in 1991, Hart continued his singles career, winning his first WWF Championship (WWE Championship) the following year. WWE has asserted that "in the mid ?90s, there were very few, if any, superstars as popular as Bret "Hitman" Hart." Hart left the WWF for a lucrative World Championship Wrestling (WCW) contract following the Montreal Screwjob in 1997, where he enjoyed continued championship success until his initial retirement in 2000, due to injury. He continued to make non-wrestling appearances in promotions such as World Wrestling All-Stars (WWA), One Pro Wrestling (1PW) and Ring of Honor (ROH) for the remainder of the decade. He returned to WWE for live appearances and professional wrestling matches in 2010, achieving further championship success. Described by owner Vince McMahon as the greatest technical wrestler and storyteller in the history of the business, Hart competed as both a villain (Heel (professional wrestling)) and a fan favorite (Face (professional wrestling)) during his professional wrestling career and is widely regarded within the industry as one of the greatest professional wrestlers of all time. Several noted professional wrestlers have named Hart as one of their favorite opponents.

Hart held thirty-two championships in various promotions during his professional wrestling career, and is recognized by WWE as a seven-time World Champion (World Heavyweight Championship (professional wrestling)): a five-time (List of WWE Champions) WWF Champion (WWE Championship) and two-time (List of WCW World Heavyweight Champions) WCW World Heavyweight Champion (WCW World Heavyweight Championship), and the second WWF Triple Crown Champion (Triple Crown Championship#List of WWE Triple Crown Champions). Also a five-time (List of WWE United States Champions) WCW/WWE United States Champion (WWE United States Championship) (his four WCW reigns being the most in the history of the organization), he is tied for most reigns in history. In addition to championships, he is the 1994 Royal Rumble (Royal Rumble (1994)) co-winner (with Lex Luger), and the only two-time King of the Ring in WWE history, having won the 1991 tournament (King of the Ring#1991) and the first King of the Ring pay-per-view in 1993 (King of the Ring (1993)). One of sports-entertainments biggest names, Hart was inducted into the WWE Hall of Fame in 2006 by former on screen rival Stone Cold Steve Austin.