Jo Hartley is an English actress. She is known for her roles in the films Dead Man's Shoes (2004), This Is England (2006), The Young Victoria (2009), Torvill & Dean (2018), Slaughterhouse Rulez (2018), Eddie the Eagle (2016), Sweetheart (2021) and Bank of Dave (2023). Her television work includes This Is England '86 (2010), Not Safe For Work (2015), In My Skin (2018), After Life (2019–2022), Mandy (2021), Das Boot (2022), Death In Paradise (2023), Passenger (2024) and Adolescence (2025).

Hartley was born in the metropolitan borough of Oldham, Greater Manchester, England, and grew up in a working-class family; she attended North Chadderton School in Chadderton, Oldham. She began acting at the age of 11 in a school production of The Sound of Music as Gretel von Trapp.

She joined the Oldham Theatre Workshop, developing her acting skills until the age of 17, when she left acting to work at British Aerospace under the Youth Training Scheme. She worked there as a secretary for two years before leaving for Japan Airlines as a flight attendant.

Hartley made her film debut in 2004 in Shane Meadows' crime drama thriller Dead Man's Shoes as 'Marie'. She went on to appear in many British productions, including films such as Northern Soul and Me and Her, both in 2004; Terra Firma and Flushed in 2008; and The Crossing, Janet and Bernard and I Don't Care in 2014. Hartley was a character actress in many television films and series from 2004, with her most notable roles in This Is England '86, This Is England '88 and This Is England '90, the television miniseries continuing the film. In film, Hartley appeared in This Is England (2006) as Cynthia and in the feature film The Young Victoria in 2009 with Emily Blunt and Rupert Friend.