Arnold Alois Schwarzenegger (born July 30, 1947) is an Austrian and American actor, businessman, filmmaker, investor, retired professional bodybuilder and politician who served as the 38th governor of California between 2003 and 2011. Time magazine named Schwarzenegger one of the 100 most influential people in the world in 2004 and 2007.

Schwarzenegger began lifting weights at the age of 15 and went on to win the Mr. Universe title at age 20 and subsequently won the Mr. Olympia title seven times. He is widely regarded as one of the greatest bodybuilders of all time, and has written many books and articles about bodybuilding. The Arnold Sports Festival, considered the second-most important bodybuilding event after Mr. Olympia, is named after him. He appeared in the bodybuilding documentary Pumping Iron (1977). Schwarzenegger retired from bodybuilding and gained worldwide fame as a Hollywood action star, with his breakthrough in the sword and sorcery epic Conan the Barbarian (1982), a box-office hit with a sequel in 1984. After playing the title character in the science fiction film The Terminator (1984), he starred in the sequels Terminator 2: Judgment Day (1991), Terminator 3: Rise of the Machines (2003), Terminator Genisys (2015), and Terminator: Dark Fate (2019). His other successful action films included Commando (1985), The Running Man (1987), Predator (1987), Red Heat (1988), Total Recall (1990), and True Lies (1994), in addition to comedy films such as Twins (1988), Kindergarten Cop (1990), Junior (1994), and Jingle All the Way (1996). He is the founder of the film production company Oak Productions.

As a Republican candidate, Schwarzenegger was first elected on October 7, 2003, in a special recall election to replace then-Governor Gray Davis. He received 48.6% of the vote, 17 points ahead of Democrat runner-up Cruz Bustamante. He was sworn in on November 17 to serve the remainder of Davis' term, and was re-elected in the 2006 California gubernatorial election with an increased vote share of 55.9% to serve a full term as governor. In 2011, he reached his term limit as governor and returned to acting.

Schwarzenegger was nicknamed the "Austrian Oak" in his bodybuilding days, "Arnie" or "Schwarzy" during his acting career, and "the Governator" (a portmanteau of "Governor" and "Terminator") during his political career. He married Maria Shriver, a niece of President John F. Kennedy, in 1986. They separated in 2011 after he admitted to having fathered a child with their housemaid in 1997; their divorce was finalized in 2021.