Unbeknownst to humans, there is a thriving, technologically sophisticated society of Martians living below the surface of Mars. The Martians' Supervisor, while observing Earth, sees a mother persuading her son, Mil… See more

• Seth Green as Milo (performance capture), a 9-year-old boy who has a strained relationship with his mother
• Dan Fogler as Gribble, a man-child human who lives beneath Mars and befriends Milo… See more

Simon Wells had known Robert Zemeckis since the mid-1980s, having worked on Who Framed Roger Rabbit (1988), Back to the Future Part II (1989), Back to the Future Part III (1990), and The Polar Express (2004). The production … See more