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Net worth: $650M
Cameron’s (at left) film career has humble beginnings—the Avatar-director sold his screenplay for The Terminator for just one dollar in exchange for the opportunity to direct the film. But since then, his blockbuster movies Titanic and Avatar have become the two highest-grossing films of all time. A second and third installment of Avatar are in the works, and at a recent comic convention Cameron said the films may be shot at a higher frame rate than the industry standard to make the film seem even more real. Some estimates suggest Cameron will make over $350 million off the Avatar series alone. The star director stands to make even more money off a recent deal with Disney to build an Avatar-themed amusement park that will be constructed in 2013 at an estimated cost of $400 million.