Walter Matthau (born Walter John Matthow; October 1, 1920 – July 1, 2000) was an American actor, comedian and film director.

He is best known for his film roles in A Face in the Crowd (1957), King Creole (1958) and as a coach of a hapless little league team in the baseball comedy The Bad News Bears (1976). He also starred in 10 films alongside Jack Lemmon, including The Odd Couple (1968), The Front Page (1974) and Grumpy Old Men (1993). Matthau won the Academy Award for Best Supporting Actor for his performance in the Billy Wilder film The Fortune Cookie (1966). Matthau is also known for his performances in Stanley Donen's romance Charade (1963), Gene Kelly's musical Hello, Dolly! (1969), Elaine May's screwball comedy A New Leaf (1971) and Herbert Ross' ensemble comedy California Suite (1978). He also starred in Plaza Suite, Kotch (both 1971), Charley Varrick (1973), The Sunshine Boys (1975), and Hopscotch (1980).