What is that game called where you link any celebrity to any other celebrity?

It-never-stops: What is that game called where you link any celebrity to any other celebrity?
Im not sure if its a game or not but where you pick one celebrity and they can trace it to any other celebrity either through directors or other people. For instance I want to connect Johnny depp to any other celebrity, like lindsay lohan or charlize theron. Anyone know?

Answers and Views:

Answer by Rena
Six degrees of seperation

Answer by jake696
6 degress to Kevin Bacon

Answer by hotty_girl_forever
its called 6 degrees of seperation, and yea it is kinda like-a-game

Answer by Hsens Linkens
It’s 6 degress to Kevin Bacon.
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