DeVito plays Max Medici, the owner of a struggling circus who hopes Dumbo will bring in the crowds.
Keaton plays V.A. Vandevere, an entrepreneur who sets his sights on Medici's circus and its flying elephant.
Green plays Colette Marchant in the film, an accomplished aerialist who's cast to fly alongside Dumbo in a state-of-the-art amusement park called Dreamland.
Farrell plays Holt Farrier in the movie, a former circus star charged with caring for an elephant who can fly.
The movie, featuring the sweet newborn elephant with oversized ears, is set to hit theaters on March 29.