Oprah Winfrey, George Lucas and Steven Spielberg are among the five celebrities who have made it onto the new Forbes magazine 400 Richest People in America.

Lifestyle queen Martha Stewart's estimated $970 million (GBP538,900) fortune makes her the fifth richest celebrity on the list, while Winfrey comes in fourth with $1.4 billion (GBP777 million).

Property tycoon-turned-reality TV star Donald Trump ties with Spielberg for second, with $2.7 billion (GBP1.5 billion) fortunes, while Lucas tops them all with $3.5 billion (GBP1.9 billion).

But none of them come close to America's richest person - Microsoft boss Bill Gates, whose fortune is estimated at a whopping $50 billion (GBP28 billion).