Everything you need to know about Hugh Hefner's 4 children, who could inherit his Playboy empire

Playboy founder and lifelong ladies man Hugh Hefner died of natural causes on Wednesday, at age 91.

He left behind the Playboy empire, a 31-year-old wife, and four kids (one daughter and three sons).

His children come from his two previous marriages. One has managed to stay out of the spotlight, one is following his father's footsteps, one has used their resources for charitable work, and one is writing books about zombies. 

But exactly who are Hefner's children, the people responsible for carrying the legacy he left behind? 

Here are all of Hugh Hefner's kids, and what they're up to today: