Hollywoood actor Leonardo DiCaprio won the Oscar for the Best Actor for his film "The Revenant" at the 88th Academy Awards ceremony held here on Sunday.This was the first Oscar win for Leonardo, after being previously nominated but missing it."The Revenant" is about a frontiersman on a fur trading expedition in the 1820s who fights for survival after being mauled by a bear and left for dead by members of his own hunting team.