Wednesday Trivia

The answers to yesterday's questions are:
Clark Gable and Claudette Colbert, "It Happened One Night" (1934).
Jack Nicholson and Louise Fletcher, "One Flew Over the Cuckoo's Nest" (1975).
Peter Finch and Faye Dunaway, "Network" (1976).
Jon Voight and Jane Fonda, "Coming Home" (1978).
Henry Fonda and Katharine Hepburn, "On Golden Pond" (1981).
Anthony Hopkins and Jodie Foster, "The Silence of the Lambs" (1991).
Jack Nicholson and Helen Hunt, "As Good As It Gets" (1997).

Today's question is:
What one individual has won the most Academy Awards?