Walter Matthau is a Buddhist.
Walter Matthau ( [ ˈmæθaʊ ] October 1 , 1920 -- July 1 , 2000 ) was an American actor and comedian , best known for his role as Oscar Madison in The Odd Couple and its sequel 30 years later , The Odd Couple II , and his frequent collaborations with Odd Couple co-star Jack Lemmon , particularly in the '90s with Grumpy Old Men and its sequel Grumpier Old Men .