Who financed James Cameron's avatar movie?

James Cameron's "Avatar" was primarily financed by 20th Century Fox, which co-produced the film along with Lightstorm Entertainment, Cameron's production company. The film's budget was notably high, estimated at around $237 million, making it one of the most expensive films ever produced at the time. Cameron's innovative use of technology and 3D filmmaking also contributed to the film's financial backing and marketing strategy.