Career
Farrow attended Itchen College in Southampton where she was part of the team who won the ECFA National Knockout Cup, scoring four goals in the final against Wyke College at the Bescot Stadium.[2]
Chelsea
Farrow made her debut for Chelsea during the 2014 FA WSL season.[3] Chelsea finished in second place with a 8–4–2 record.[3]
Farrow returned for the 2015 FA WSL season and scored her first goal against Bristol City on 12 July 2015.[3][4] She made two appearances for Chelsea during the regular season. The team finished in first place.[3]
Bristol City
Farrow went on loan to Bristol City in January 2016 ahead of the 2016 FA WSL season.[5][6] She scored 11 goals in her 16 appearances for the team and helped secure a second-place result with a 10–3–3 record and promotion to FA WSL 1.[7] Farrow scored a brace during the final game of the season against Oxford United helping Bristol City win 5–0.[8]
Farrow signed permanently for Bristol City in January 2018, after her previous loan spell had been cut short by injury.[9]
Reading
On 22 July 2018, Farrow joined Reading.[10] On 8 June 2020, Reading announced that Farrow had left the club after her contract had expired.[11]
Leicester City
On 22 August 2020, FA Women's Championship club, Leicester City announced the signing of Millie Farrow ahead of the 2020–21 season, among seven other FA WSL players, as they embarked on their journey as a fully professional club.