The Q Theatre was a British theatre located near Kew Bridge in Brentford, west London, which operated between 1924 and 1958. It was built on the site of the former Kew Bridge Studios. The theatre, seating 490 in 25 rows with a central aisle, was opened in 1924 by Jack and Beatie de Leon with the financial support of Jack's sister Delia. It was one of a number of small, committed, independent theatre companies which included the Hampstead Everyman, the Arts Theatre Club and the Gate Theatre Studio. These theatres took risks by producing new and experimental plays which, although often at first thought to be commercially unviable on the West-End stage, later went on to transfer successfully.