Sacha Baron Cohen will star in Quentin Tarantino's West End play, a debut play titled 'The Popinjay Cavalier,' at the Phoenix Theatre. This marks Tarantino's initial foray into stage productions. The production features Baron Cohen and is scheduled for a performance in the West End. Tarantino's initial stage venture will be at the Phoenix Theatre. Baron Cohen is set to star in the play, which is titled 'The Popinjay Cavalier.'