He has also directed opera at Glyndebourne, and began directing for television with Antony and Cleopatra (starring Suzman) in 1974. He re-staged his highly successful Gyndebourne production of Gershwin's Porgy and Bess for television in 1993, and it was more favorably received than the 1959 Samuel Goldwyn - Otto Preminger film version of the opera. He has occasionally ventured into film directing, such as Lady Jane (1986), Hedda, an adaptation of Hedda Gabler, and a 1996 film version of Shakespeare's Twelfth Night. He is currently married to actress Imogen Stubbs, whose play We Happy Few he directed, and who often appears in his productions, including the Twelfth Night mentioned above.
Besides Cats and Les Misérables Nunn's other musical credits include Starlight Express and Sunset Boulevard. His current London production Les Miserables, has been running for nearly 22 years, whilst recent London credits include My Fair Lady, South Pacific (at the Royal National Theatre), The Woman In White, Othello and Acorn Antiques The Musical, The Royal Hunt of the Sun, Rock 'N' Roll (starring Alice Eve, Sinead Cusack, Brian Cox and Rufus Sewell) and Porgy and Bess (an abridged version with dialogue instead of recitatives, unlike Nunn's first production of the opera).
In 2007 his RSC productions of King Lear and The Seagull played at Stratford before embarking on a world tour and playing at the New London Theatre from November 2007. The two plays both starred Ian McKellen, Romola Garai, Frances Barber, Sylvester McCoy, and William Gaunt. Nunn's television production of King Lear is to be screened on Boxing Day, 2008.
In 2008 he returned to The Belgrade Theatre in Coventry (the theatre where he started his career) to direct Joanna Murray-Smith's adaptation of Ingmar Bergman's film Scenes from a Marriage starring Imogen Stubbs and Iain Glen.