In what sounds like a theater fan's biggest musical mash-up fantasy come true, the casts of the Les Misérables, Chicago and Dreamgirls films assembled at the Oscars to pay tribute to modern movie musicals. Oscar winners Jennifer Hudson and Catherine Zeta-Jones took the stage alongside Les Miz revolutionaries Hugh Jackman, Anne Hathaway, Aaron Tveit, Eddie Redmayne, Russell Crowe, Amanda Seyfried, Samantha Barks, Sacha Baron Cohen and Helena Bonham Carter. Check out the performance below, and here's hoping there are plenty more movie musicals for the Oscars to toast in years to come!