Kate Greer
Model Kate Greer began dating Jack Dorsey, an IT super-nerd and billionaire who founded a little social media platform known as Twitter. To this day, the two aren’t married, so she’s technically not a member of the billionaire wives club, though she might as well be an honorary member.
The two have been together for so long that it’s hard to imagine one without the other. While their relationship hasn’t been all flowers and rainbows, it seems that nothing can wedge them apart. Kate hasn’t mentioned any plans to have children, possibly due to her commitment to Campinterative, an organization that focuses on helping children develop IT skills.