Alison Pincus had already made a name for herself in business under her original name of Alison Geld long before she met Mark Pincus and married him. She's the owner and operator of the One King' Lane luxury furnishings website, which has netted her an impressive $440m.
Her husband brings a further $1.1bn to the table. That's money he's made through Zynga Inc. You might not know the company, but your kids do - they make a lot of social app games for smartphones and tablets.