Movie star Will Smith believes he saw a UFO.  According to reports, Will reckoned he caught an extra-terrestrial being flying about whilst out in the car with friends. 

Not much else is known about the encounter as he hasn't spoken openly about it since.

Source: http://www.thesun.co.uk/sol/homepage/features/2655271/Celebrity-alien-encounters.html?offset=3#ixzz0UCSE8nIY