REPUBLICAN vice presidential candidate Sarah Palin debates her Democratic rival, Joe Biden, on Thursday in their only face-off before the Nov 4 presidential election.
The following are some biographical details for Mr Palin, a little-known Alaska governor before she was chosen as Mr John McCain's running mate:
Age: 44
Birth date: Feb. 11, 1964
Birthplace: Sandpoint, Idaho
Education: University of Idaho
Husband: Todd Palin
Children: Two sons and three daughters
Religious affiliation: Has attended nondenominational Wasilla Bible Church in recent years; previously attended Wasilla Assembly of God, a Pentecostal church
Family: Mrs Palin moved to Alaska with her parents, a teacher and school secretary, when she was an infant. She grew up in Wasilla, a town of nearly 10,000 near Anchorage.
Mrs Palin was a member of the state champion girls basketball team, where she earned the nickname 'Sarah Barracuda' for her aggressive play.
She was crowned Miss Wasilla in a 1982 beauty pageant and later competed in the Miss Alaska contest.
Palin graduated in 1987 from the University of Idaho with a degree in journalism and political science and eloped with her high school boyfriend in 1988 to avoid the cost of a wedding.
The couple have five children - two sons and three daughters. The eldest son, Track, was deployed to Iraq with the US Army in September.
The youngest, son Trig, was born in April with Down syndrome.
Career: After her graduation and marriage, Mrs Palin worked as a television sports reporter from 1987 to 1989.
She also worked in the family's commercial fishing business and was the owner of a snowmobile, watercraft and all-terrain vehicle business.
Elective office/public service: Mrs Palin was elected to the Wasilla City Council in 1992. She served two terms on the council and was elected mayor for two terms. She gained the attention of Republican Party officials by promoting growth and cutting property taxes.
Mrs Palin ran for lieutenant governor in 2002 but lost. After actively campaigning for the Republican ticket under Frank Murkowski, she was appointed to the panel that regulates the state's oil and gas industry.
Mrs Palin established herself as a party outsider by promoting a pipeline project opposed by Mr Murkowski.
She ran against the governor in 2006, defeated him in the primary and then defeated a former Democratic governor in the general election.
As governor she has worked on ethics reform, sought to reduce state spending and promoted a deal that would offer US$500 million (S$720 million) in seed money for the construction of a natural gas pipeline.
She ignited a controversy by firing the state's respected top police officer. He charged he was dismissed for resisting pressure from the governor's office to lay off a state trooper who was involved in a bitter divorce and custody dispute with Mrs Palin's sister.
The state Legislature is investigating the incident. -- REUTERS