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.
Hamnet Joan
Maryland PC Eddowes
The Stag Linda
The Murder in Angel Lane Sister Anne
National Theatre Live: King Lear Regan
Sleep With Me Catrin
Imagine Me & You Laura
Song of Songs Laura
A Cock and Bull Story Tony's Director
The Honeymooners Fiona
Citizen Verdict
Conspiracy of Silence
Goldfish Memory Kate
These Sacred Vows Sandra · 6 eps
Black Doves Emma · 2 eps
A Spy Among Friends Eleanor Philby · 1 ep
Conversations with Friends Paula · 5 eps
Smother Elaine Lynch · 18 eps
Industry Rose Winter · 2 eps
Cheat DI Bould · 4 eps
Pure Connie · 2 eps
Derry Girls Adult Janette · 1 ep
The Crown Sarah McCorquodale · 1 ep
Amber Maeve Flynn-Dunne · 4 eps
Storyland Ruth's Mother (voice) · 1 ep
Waking the Dead Una Doyle · 2 eps
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These Sacred Vows 2026Sandra ·6 eps - Hamnet 2025Joan
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Black Doves 2024Emma ·2 eps -
A Spy Among Friends 2022Eleanor Philby ·1 ep - Maryland 2022PC Eddowes
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Conversations with Friends 2022Paula ·5 eps -
Smother 2021Elaine Lynch ·18 eps -
Industry 2020Rose Winter ·2 eps -
Cheat 2019DI Bould ·4 eps -
Pure 2019Connie ·2 eps -
Derry Girls 2018Adult Janette ·1 ep -
The Crown 2016Sarah McCorquodale ·1 ep -
Amber 2014Maeve Flynn-Dunne ·4 eps - The Stag 2013Linda
- The Murder in Angel Lane 2013Sister Anne
- National Theatre Live: King Lear 2011Regan
- Sleep With Me 2009Catrin
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Storyland 2009Ruth's Mother (voice) ·1 ep - Imagine Me & You 2006Laura
- Song of Songs 2005Laura
- A Cock and Bull Story 2005Tony's Director
- The Honeymooners 2004Fiona
- Citizen Verdict 2003
- Conspiracy of Silence 2003
- Goldfish Memory 2003Kate
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Waking the Dead 2001Una Doyle ·2 eps