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Justine Mitchell

Feb 26, 2026 (0 years old) in Dublin, Ireland

Justine Mitchell is an Irish actress. She is best known for playing Elaine Lynch in the Irish thriller series Smother (2021-2023) and for portraying Joan Hathaway in Chloé Zhao's 2025 period drama film Hamnet.

Known For

Hamnet

The Crown

Industry

Waking the Dead

Derry Girls

Credits

2026 · These Sacred Vows as Sandra
2025 · Hamnet as Joan
2024 · Black Doves as Emma
2022 · A Spy Among Friends as Eleanor Philby
2022 · Maryland as PC Eddowes
2022 · Conversations with Friends as Paula
2021 · Smother as Elaine Lynch
2020 · Industry as Rose Winter
2019 · Cheat as DI Bould
2019 · Pure as Connie
2018 · Derry Girls as Adult Janette
2016 · The Crown as Sarah McCorquodale
2014 · Amber as Maeve Flynn-Dunne
2013 · The Stag as Linda
2013 · The Murder in Angel Lane as Sister Anne
2011 · National Theatre Live: King Lear as Regan
2009 · Sleep With Me as Catrin
2009 · Storyland as Ruth's Mother (voice)
2006 · Imagine Me & You as Laura
2005 · Song of Songs as Laura
2005 · A Cock and Bull Story as Tony's Director
2004 · The Honeymooners as Fiona
2003 · Citizen Verdict as
2003 · Conspiracy of Silence as
2003 · Goldfish Memory as Kate
2001 · Waking the Dead as Una Doyle