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
as Joan
The Crown
as Sarah McCorquodale
Industry
as Rose Winter
Waking the Dead
as Una Doyle
Derry Girls
as Adult Janette
Black Doves
as Emma
Conversations with Friends
as Paula
These Sacred Vows
as Sandra
A Spy Among Friends
as Eleanor Philby
Smother
as Elaine Lynch
Imagine Me & You
as Laura
Cheat
as DI Bould
Storyland
as Ruth's Mother (voice)
Amber
as Maeve Flynn-Dunne
Pure
as Connie
A Cock and Bull Story
as Tony's Director
Conspiracy of Silence
The Honeymooners
as Fiona
The Stag
as Linda
The Murder in Angel Lane
as Sister Anne
