He played the lead role of Frederick Trenchard in
Julian Fellowes period-drama
Belgravia: The Next Chapter in 2024. His credits also include
Gangs of London, and
BBC One series'
World on Fire and
The Split. He has a voice role in
The Lord of the Rings: The War of the Rohirrim. In September 2024, he started production in the title role of an adaptation of
Maigret for
PBS Masterpiece, based on
Georges Simenon’s novels about
Jules Maigret, a chief inspector for the Paris police. It has now been released on Masterpiece Theater in the US, with Wainwright filming a second series in 2026. ==Partial filmography==