Steven Peter Devereux Smith (স্টিভ স্মিথ) is an Australian international cricketer, former captain of the Australian national team in all three formats of the game and since 2021, the vice-captain of the Australian Test team. He is regarded as the best Test batsman of his generation, scoring over 10,000 Test runs, having reached an ICC Test batting rating of 947, the second-highest figure of all time, only behind Don Bradman's 961 and was named ICC Men's Test Player of the Decade for 2011–2020.

Although he was initially selected for Australia as a leg-spinning all-rounder in all formats in 2010, Smith was always earmarked as a batting prospect following successful batting campaigns in domestic cricket early in his career. After playing five Test matches from 2010 to 2011 as a bowling all-rounder, he was recalled to the Australian Test team in 2013 as a batsman and took over the captaincy from Michael Clarke in late 2015. Smith now plays primarily as a batsman, and has predominantly batted at number 4 in Test cricket and number 3 in ODIs and T20Is.

Steve Smith was born on 2 June 1989 in Kogarah, a suburb of the St George region of Southern Sydney to an Australian father, Peter, who has a degree in chemistry, and an English mother, Gillian. Smith attended Menai High School and left at age 17 to play cricket in England.

Because his mother was born in London, Smith has dual British and Australian citizenship. In 2011, Smith started dating Dani Willis, a commerce and law student at Macquarie University. In June 2017, the couple announced their engagement while on holiday in New York. The couple married at Berrima, New South Wales on 15 September 2018.

Smith is a supporter of the Sydney Roosters in the National Rugby League.

During his junior years of cricket, Smith's role was primarily batting all-rounder, bowling fast-medium until the age of 15 before switching to leg-spin. In 2007, Smith temporarily left Australia to play cricket in England, where he played club cricket for Sevenoaks Vine in the Kent Cricket League. His outstanding performances for Sevenoaks resulted in being selected to play for Surrey County's second XI. Smith was a member of the Australian team at the 2008 Under-19 Cricket World Cup in Malaysia. In the tournament he scored 114 runs and took seven wickets in four matches.

Smith made his first-class debut for New South Wales against Western Australia at the SCG on 25 January 2008. He scored 33 runs in his only innings as New South Wales defeated Western Australia. He was part of the New South Wales team that won the 2009 Twenty20 Champions League. In the final against Trinidad and Tobago at Hyderabad, Smith delivered an all-round performance, scoring 33 runs with the bat and taking two wickets.

Smith is a right-handed batsman with a technique that has been compared to Don Bradman and has attracted attention for its unorthodoxy. Smith is considered to be a fidgety batter whose mannerisms and idiosyncrasies have gained global attention. He moves around frequently in the crease, especially during bowlers' run-up, and ends up with the toes of his feet outside off stump against right-handers, controls the bat with his bottom hand (that is, the hand closest to the blade of the bat), and is capable of playing unconventional cricket shots like the reverse sweep. Playing in a club match in January 2010, right-handed Smith took guard left-handed and hit a six. Due to his unorthodox style, Smith was initially labelled as a limited-overs batsman who might struggle in the longer form of the game, especially early in his career when he was vulnerable outside off stump. However, Smith compensates for his unique technique with outstanding hand-eye co-ordination, focus, and his footwork, especially to spin bowlers, is exemplary. Smith spontaneously experimented with his technique during the Perth Test match in the 2013–14 Ashes, during which he decided to take a "prelim movement back and across" to counter short-pitched bowling. This change took his batting average from 33 in 2013 to 64.95 in 2019. As of 2024, it is 58.01. At the time of delivery, Smith's stumps are fully covered, making bowled dismissals unlikely. This position also allows him to play to either the on or off side with ease.