GI (G.I.), Gi or gi may refer to:

Walter Bruce Willis (born March 19, 1955) is a German-born American actor, producer, and musician. His career began in television in the 1980s and has continued both in television and film since, including comedic, dramatic, and action roles. He is well known for the role of John McClane in the Die Hard series, which were mostly critical and uniformly financial successes. He has also appeared in over sixty films, including box office successes like Pulp Fiction (1994), 12 Monkeys (1995), The Fifth Element (1997), Armageddon (1998), The Sixth Sense (1999), Unbreakable (2000), Sin City (2005), Over the Hedge (2006) and Red (2010).

Motion pictures featuring Willis have grossed US$2.64 billion to 3.05 billion at North American box offices, making him the ninth highest-grossing actor in a leading role and twelfth highest including supporting roles. He is a two-time Emmy Award–winning, Golden Globe Award–winning and four-time Saturn Award–nominated actor. Willis was married to actress Demi Moore and they had three daughters before their divorce in 2000, following thirteen years of marriage. He is currently married to model Emma Heming, with whom he has one daughter.

Channing Matthew Tatum (born April 26, 1980) is an American actor, film producer, dancer, and former model, best known for his roles in Step Up (2006), G.I. Joe: The Rise of Cobra (2009), Dear John (2010), The Vow (2012), and 21 Jump Street (2012). He has also appeared in films such as Coach Carter (2005), She's the Man (2006), A Guide to Recognizing Your Saints (2006), and Fighting (2009). While mostly known for his dramatic performances in Dear John and The Vow, he has since ventured into more comedic roles.

Tatum was born and raised in Cullman, Alabama. His mother, Kay (née Faust), is an airline worker, and his father, Glenn Tatum, worked in construction. His ancestry includes Irish, French and Native American. Tatum's family moved to Mississippi when he was six, and he grew up in the bayous near the Mississippi River, where he lived in a rural setting.

Tatum was athletic while growing up, playing football, soccer, track, baseball, and performing martial arts; he has said that "girls were always [his] biggest distraction in school." As a child, he practiced wuzuquan kung fu under the lineage of 10th dan Grandmaster Chee Kim Thong. Tatum spent most of his teenage years in the Tampa, Florida area and initially attended Gaither High School before going to Tampa Catholic High School. He graduated in 1998 and was voted most athletic. Afterward, Tatum attended Glenville State College in Glenville, West Virginia on a football scholarship, but dropped out. He returned home and started working odd jobs. US Weekly reported that around this time Tatum began working as a stripper at a local nightclub, under the name "Chan Crawford." In 2010, he told an Australian newspaper that he would like to make a movie about his experiences as a stripper. He later moved to Miami, where he was discovered on the street by a model talent scout.

Dwayne Douglas Johnson (born May 2, 1972), also known by his ring name The Rock, is an American actor and professional wrestler who is signed to WWE, appearing on the Raw brand. He is often credited as Dwayne "The Rock" Johnson.

Johnson was a college football player. In 1991, he was part of the University of Miami's national championship team. He later played for the Calgary Stampeders in the Canadian Football League, and was cut two months into the 1995 season. This led to his decision to become a professional wrestler like his grandfather, Peter Maivia, and his father, Rocky Johnson. He gained mainstream fame as a wrestler in the World Wrestling Federation (WWF) from 1996 to 2004, and was the first third-generation superstar in the company's history. Johnson was quickly given a push as a heroic character in the WWF, originally billed as "Rocky Maivia", and then as "The Rock". He would subsequently turn into a villain as a member of the Nation of Domination in 1997. Two years after he joined the WWF, Johnson won the WWF Championship, and became one of the most popular wrestlers within the company's history for his engaging interviews and promos. Johnson is regarded by many as one of the greatest talkers in professional wrestling history, Rock was voted third by the fans for his microphone ability behind Roddy Piper and Stone Cold Steve Austin who were second and first respectively.