Brendan Gleeson (Harry Potter, The Banshees of Inisherin) makes his long-awaited West End debut in Conor McPherson's masterpiece this autumn following a launch at Dublin's Olympia Theatre. Premiering in 1997 at The Royal Court, The Weir won the coveted trinity of theatre awards: the Evening Standard, Critics' Circle, and Olivier Awards for Best New Play, cementing McPherson's status as a playwright.