Alexandra Joy Blackwell' (born 31 August 1983) is a professional cricketer who plays for New South Wales and Australia as a specialist batsman. In October 2017, she made her 250th international appearance for the Australian women's cricket team. Her identical twin sister Kate has also played for Australia.
Blackwell came out as lesbian in 2013, becoming the second international player to come out during their playing career after England's Steven Davies. She married fellow cricketer Lynsey Askew in England in 2015, a union that was not recognised in Australia until 2017.