39. Robert Downey Jr. – $11.9 Million, East Hamptons
After kicking off the Marvel Cinematic Universe with Iron Man, Robert Downey Jr. is doing very well for himself. He proudly owns a four-acre East Hamptons estate. The luxurious mansion has a seven-bedroom main house, a two-bedroom guest house, as well as a large pool, a tennis court, a three-car garage, and a studio. And the best part is the high-profile star never needs to worry about mortgages or homeowner insurance.