UPDATED 25 March 2026: Full casting has been announced for Heartsink. Joining Kathy Kiera Clarke (Derry Girls) as Cara are: Aden Gillet (The House of Elliott) as Dr Jeffrey Longford, Vikash Bhai (Limbo) as Dr Roofi, and Megan Marszal (Helloween) as Suzie.
Initial casting has been announced for the new medical comedy Heartsink at the Riverside Studios in London.
Written by former GP Farine Clarke (London Zoo), Heartsink is premiering at Riverside Studios from 21 April to 10 May 2026.
The show will star Kathy Kiera Clarke as Cara, with further casting to be announced. Kathy Kiera Clarke is best known for playing Aunt Sarah in hit TV comedy Derry Girls.
Heartsink is directed by Sean Turner (Why I Stuck A Flare Up My Arse For England, The Play That Goes Wrong).
“Farine’s writing is sharp, compassionate and very funny — even when it’s tackling the most serious subjects. Cara is a brilliant, multi-faceted, complex role and I’m delighted to be bringing this story to the stage at Riverside Studios.” – Kathy Kiera Clarke
Her other stage credits include Portia Coughlan (Almeida Theatre), The Dry House (Marylebone Theatre), Medea (Citizens Theatre Glasgow – Ian Charleson Award commendation), and Tartuffe (National Theatre).
Kathy Kiera Clarke’s other screen credits include Bloody Sunday (IFTA Award nomination) and The Pale Horse (Amazon Prime).
The wider creative team for the production includes set designer Matteo Mastrandrea, lighting designer Chuma Lighting Design, sound designer Hattie North, designer Tom Mann, and casting director Ellie Collyer-Bristow Casting.
Book tickets to Heartsink in London
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