The Citizens Theatre, in what was the Royal Princess's Theatre, is the creation of James Bridie and is based in Glasgow, Scotland as a principal producing theatre. The theatre includes a 500-seat Main Auditorium, and has also included various studio theatres over time.

James Bridie was the pseudonym of a Scottish playwright, screenwriter and physician whose real name was Osborne Henry Mavor. He took his pen-name from his paternal grandfather's first name and his grandmother's maiden name.