David Andrew Warner is an Australian former international cricketer and captain of Big Bash League team, Sydney Thunder and also captain of Pakistan Super League team Karachi Kings A left-handed opening batter, Warner was the first Australian cricketer in 132 years to be selected for the national team in any format without experience in first-class cricket. Warner is widely regarded as one of the best opening batsman of his generation. He captained Australia in ODIs and T20Is and served as a vice-captain across formats before his suspension and played his domestic cricket for New South Wales. Warner was a prominent member of the victorious Australian squad of the 2015 Cricket World Cup, the 2021 T20 World Cup, where he was the Player of the Tournament, the 2021–2023 ICC World Test Championship, and the 2023 ICC Cricket World Cup. Warner also guided Sunrisers Hyderabad an IPL franchise based out of Hyderabad to their first and only IPL title, becoming second Australian captain after Adam Gilchrist to do so.

David Warner was born on 27 October 1986 in Paddington, a suburb in eastern Sydney. At the age of 13, he was asked by his coach to switch to right-handed batting because he kept hitting the ball in the air. However his mother, Lorraine Warner (née Orange), encouraged him to return to batting left-handed and he broke the under-16's run-scoring record for the Sydney Coastal Cricket Club. He then made his first grade debut for the Eastern Suburbs club at the age of 15 and later toured Sri Lanka with the Australian under-19s and earned a rookie contract with the state team. Warner grew up in a housing commission estate in Matraville in Sydney's south-east and attended Matraville Public School and Randwick Boys High School.

Warner married Australian former Ironwoman Candice Falzon in April 2015. They have three daughters. He lives in Maroubra, a suburb of Sydney and is a supporter of the Sydney Roosters in the National Rugby League.