Albert II, Prince of Monaco and Charlene Wittstock

Prince Albert II of Monaco is one of the world’s wealthiest monarchs, with an estimated net worth of $1 billion. He is also seen as a bit of a playboy and has fathered two children out of wedlock. But that was before he met his current wife.

He Married former South African Olympic swimmer Charlene Wittstock in July 2011, and it appears the Prince’s penchant for the ladies has been in check ever since. Wittstock gave birth to twins in December 2014, and both royals in their marriage have philanthropic projects: Albert focusing on the environment and Charlene on AIDS, sports, and underprivileged children.