If you have blue eyes, you are probably related to Brad Pitt...and Frank Sinatra... and about 300-million other people out there with blue eyes.
A report published in The Journal Of Human Genetics says that researchers have found that every person with blue eyes descended somehow from one person whose genes mutated about 10,000 years ago. Before that time, everyone had brown eyes. The mutation blocked the brown pigment in one baby...and the rest is history.