When dad is a former Beatle worth $600 million, who needs to work? Stella McCartney, that's who. The designer has given her father a run for his money — she's worth a reported $25 million — and she's also taking her place as an iconic British figure. Stella is a member of the Order of the British Empire and designed the uniforms for Team GB for the London Olympics. Her siblings are no slouches either. For example, sister Mary McCartney is a successful professional photographer, like her mother Linda.