Colin Firth plays Michael Peterson, Toni Collette plays Kathleen Peterson, and Juliette Binoche plays Sophie Brunet in the 2022 HBO Max true-crime drama The Staircase.
Main cast
- Michael PetersonColin Firth1Main
- Kathleen PetersonToni Collette1Main
- Sophie BrunetJuliette Binoche1Main
- David RudolfMichael Stuhlbarg1Main
- Candace ZamperiniRosemarie DeWitt1Main
- Margaret RatliffSophie Turner1Main
- Martha RatliffOdessa Young1Main
- Clayton PetersonDane DeHaan1Main
- Todd PetersonPatrick Schwarzenegger1Main
Supporting cast
- Freda BlackParker Posey1Supp
- Jim HardinVincent Vermignon1Supp
- Bill PetersonTim Guinee1Supp
- Larry PollardJoel McKinnon Miller1Supp
Guest & voice
- Ron GueretteCullen Moss1Guest
- Dr. Deborah RadischSusan Pourfar1Guest
No matches — try another name.
About this cast
The Staircase is a 2022 true-crime drama series based on the 2004 documentary of the same name. It stars Colin Firth as Michael Peterson, a novelist accused of murdering his wife Kathleen, played by Toni Collette, with Juliette Binoche as his girlfriend Sophie Brunet. The series explores the investigation, trial, and aftermath of the case.
FAQs
Who plays Michael Peterson in The Staircase?
Colin Firth plays Michael Peterson in the 2022 HBO Max series The Staircase.
Is The Staircase based on a true story?
Yes, it is based on the real-life case of Michael Peterson, who was convicted of murdering his wife Kathleen in 2001, and the 2004 documentary of the same name.
How many episodes are in The Staircase?
The series has 8 episodes, all released in 2022.
Who plays Kathleen Peterson in The Staircase?
Toni Collette plays Kathleen Peterson in the series.
What is the role of Juliette Binoche in The Staircase?
Juliette Binoche plays Sophie Brunet, the editor of the documentary who becomes Michael Peterson’s girlfriend during the trial.
Sources & where to watch: IMDb · Wikipedia · Where to watch (JustWatch UK) · Updated June 2026