John Randall Hennigan (born October 3, 1979) is an American professional wrestler, actor and traceur, who currently wrestles for Impact Wrestling under the ring name Johnny Impact, where he is the Impact World Champion in his first reign. He is best known for his tenure in WWE where he used the ring names John Morrison and Johnny Nitro. He is also known for wrestling on the independent circuit, Lucha Libre AAA Worldwide and Lucha Underground under the ring name Johnny Mundo.
Hennigan was the winner of Tough Enough III, a televised competition that would award the winner a WWE contract, and was assigned to their then developmental territory, Ohio Valley Wrestling (OVW), to continue his wrestling training. Hennigan was called up to the SmackDown! roster in April 2005 and on his debut match, Hennigan (alongside Joey Mercury) won the WWE Tag Team Championship. In the main roster, Hennigan won the ECW World Championship once and the Intercontinental Championship three times. He was also a prolific tag team wrestler, being a five-time world tag team champion (one World Tag Team and four WWE Tag Team Championships).