Alistair Overeem，Originally from Hounslow, England, Alistair Cees Overeem spent most of his life in Holland. Along with his older brother, Valentijn Overeem, Alistair was brought by his mother to Holland at age 6 after she and their father divorced. Alistair's interest in combat sports began at 15, when Valentijn took him to a gym to learn self-defense.