Idris Elba Says Working br With Taylor Swift on br 'Cats' Was 'Amazing' The actor and the pop sensation br worked together filming the br live-action adaptation of br the iconic stage musical. He described Swift as br "just happy to be there" br with her co-stars. Idris Elba, via 'Variety' For the filming, Swift br and Elba shared the br stage with other A-list stars including Dame Judi Dench, br Jennifer Hudson, James Corden br and Rebel Wilson.