You won't believe who they're related to.

Do BRAD PITT and ANGELINA JOLIE have presidential pedigrees? According to the Associated Press, they do: BARACK OBAMA is Pitt's ninth cousin, and HILLARY CLINTON is Jolie's ninth cuz' twice removed.

Other surprising links made by researchers at the New England Historic Genealogical Society: Clinton is a distant cousin of MADONNA, CELINE DION and ALANIS MORISSETTE, while Obama can call GEORGE W. BUSH, DICK CHENEY and Republican rival JOHN McCAIN cuz', too.

Obama's lineage is a veritable all-star team of ex-presidents, including GEORGE BUSH, GERALD FORD, LYNDON B. JOHNSON, HARRY S. TRUMAN and JAMES MADISON.