Idris Elba, Ian McKellen, Rebel Wilson, Taylor Swift, Judi Dench, James Corden, Francesca Hayward, Jason Derulo, Jennifer Hudson and more star in this new trailer for 'Cats'. A tribe of cats called the Jellicles must decide yearly which one will ascend to the Heaviside Layer and come back to a new Jellicle life. This trailer is in HD.