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Monty Kip Sopp (born November 11, 1963), better known by his ring name Billy Gunn, is an American professional wrestler, former professional bull rider, and singercurrently working for New Japan Pro Wrestling (NJPW). Gunn is best known for his appearances in the World Wrestling Federation/Entertainment (WWF/E) from 1993 to 2004 and from 2012 to 2015. He also served as a coach on WWE's Tough Enough, and was a trainer in its developmental branch, NXT. He is also known for his appearances with Total Nonstop Action Wrestling (TNA) from 2005 to 2009.

In a 2001 match on Sunday Night Heat, Gunn was defeated by Chuck Palumbo, who recently left The Alliance to join the WWF. After the match, Gunn suggested that they form a tag team. Palumbo agreed, and Billy and Chuck quickly rose to the top of the tag team division. Initially they were a generic face tandem, but soon turned heel when they were given a gimmick where they grew increasingly affectionate toward each other, showing evidence of a storyline homosexual relationship. In February 2002, Billy and Chuck defeated Spike Dudley and Tazz to win the Tag Team Championship for the first time as a team. After winning the titles, Billy and Chuck found a "Personal Stylist" in the ambiguously flamboyant Rico. After retaining the title against the Acolytes Protection Agency, the Dudley Boyz, and the Hardy Boyz in a Four Corners Elimination Match at WrestleMania X8 and against Al Snow and Maven at Backlash, Billy and Chuck began a feud with Rikishi. At Judgment Day, Rikishi and Rico (Rikishi's mystery partner of Mr. McMahon's choosing) defeated Billy and Chuck for the Tag Team Title after Rico accidentally hit Chuck with a roundhouse kick. Billy and Chuck quickly won the title back two weeks later on SmackDown! with Rico's help. They held the championship for almost a month before losing it to the team of Edge and Hulk Hogan. On the September 5 edition of Smackdown!, after Gunn lost a match to Rey Mysterio, Chuck proposed to Billy, asking him to be his "partner for life" and gave him a wedding ring. Gunn agreed, and one week later, on the September 12 episode of SmackDown!, Billy and Chuck had their wedding ceremony. However, just before they tied the knot, they revealed that the entire ordeal was a publicity stunt and disavowed their on-screen homosexuality, admitting that they were just friends. The "preacher" revealed himself to be Raw General Manager Eric Bischoff (who was wearing a skin mask), who then summoned 3-Minute Warning to beat up Billy and Chuck. Rico, furious that Billy and Chuck gave up their gimmick, became the manager of Three Minute Warning and defected to Raw, effectively turning Billy and Chuck face in the process. At Unforgiven, Three Minute Warning defeated Billy Gunn and Chuck Palumbo. Their final match together occurred on SmackDown! in the first round of a tournament for the newly created WWE Tag Team Championship. They lost the match to the team of Ron Simmons and Reverend D-Von. Afterwards, Sopp took a few months off because of a shoulder injury and the team of Billy and Chuck quietly disbanded.
Billy Gunn