Malcolm Sinclair has performed in more than 50 theatrical productions and was nominated for Best Supporting Actor at the 2019 Olivier Awards for his performance in Pressure at The Ambassador’s Theatre.

Other theatre includes; Copenhagen (Theatre Royal Bath); Coriolanus (Crucible Theatre); An Enemy of the People (Nottingham Playhouse); This House and Rattigan’s Nijinsky (Chichester Festival Theatre); The Light in the Piazza (Royal Festival Hall); The Meeting (Hampstead Theatre); Quartermaine’s Terms and Little Lies (The Wyndham Theatre); The Power of Yes, The Habit of Art, The King James Bible Readings, Luther, The Misanthrope, and House/Garden (The Royal National Theatre); 66 Books (The Bush); Racing Demon (Sheffield Crucible); Temple Ivanov, and Privates of Parade (Donmar Warehouse); The Doctor’s Dilemma (The National Theatre); Rosmersholm and Heartbreak House (Almeida Theatre); Dealer’s Choice (Menier Chocolate factory and Trafalgar Studio); The History Boys (Royal National Theatre Broadway); What the Butler Saw (Hampstead and Criterion Theatre;, Richard III (Royal Shakespeare Company); My Fair Lady (Theatre Royal Drury Lane); Hay Fever (Savoy Theatre); Uncle Vanya (Royal Shakespeare Company and The Young Vic), Hamlet (Royal Shakespeare Company Tour); The Case of Rebellious Susan and Dark River (Orange Tree); Anatole (The gate Theatre); Facades and London’s Cuckolds (The Lyric Hammersmith)