Robson Green as Detective Inspector Geordie Keating, Tom Brittney as Reverend Will Davenport, and Al Weaver as Leonard Finch are the leads in ITV’s Grantchester.
Main cast
- DI Geordie KeatingRobson Green1–9Main
- Reverend Will DavenportTom Brittney4–9Main
- Leonard FinchAl Weaver1–9Main
- Mrs. Maguire / Cathy KeatingKacey Ainsworth1–9Main
Supporting cast
- DS Larry PetersOliver Dimsdale1–9Supp
- Mrs. CTessa Peake-Jones1–9Supp
- Esme KeatingSkye Lucia Degruttola1–9Supp
- Reverend Sidney ChambersJames Norton1–4Supp
Guest & voice
- Guy HopkinsNicholas Asbury1Guest
- Diana JamesonPip Torrens1Guest
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About this cast
Grantchester is a British period crime drama set in the 1950s, starring Robson Green as Detective Inspector Geordie Keating, Tom Brittney (series 4–9) as the local vicar Reverend Will Davenport, and Al Weaver as his faithful curate Leonard Finch. The show centres on the unlikely partnership between a detective and a clergyman solving murders in the Cambridgeshire village.
FAQs
Who plays Geordie Keating in Grantchester?
Robson Green plays Detective Inspector Geordie Keating.
Who plays Reverend Will Davenport?
Tom Brittney plays Reverend Will Davenport, taking over the lead vicar role from James Norton in series 4.
Is Grantchester based on a true story?
It is based on the ‘Grantchester Mysteries’ book series by James Runcie, which is fictional but inspired by the real-life vicar Sidney Chambers.
How many series of Grantchester are there?
As of 2025, there are 9 series (seasons). Series 9 aired in 2024.
Why did James Norton leave Grantchester?
James Norton left after series 4 to pursue other roles. His character, Sidney Chambers, moved to America.
Sources & where to watch: IMDb · Wikipedia · Where to watch (JustWatch UK) · Updated June 2026