Jack Lemmon and Walter Matthau made how many films together?

Jack Lemmon (John Uhler Lemmon III, February 1925 – June 2001) and Walter Matthau (Walter John Matthow, October 1920 – July 2000) were iconic actors and comic partners who made 10 motion pictures together between 1966 and 1998. The pictures they made include: "The Fortune Cookie" (1966), "The Odd Couple" (1968) and its sequel "The Odd Couple II" (1998), "The Front Page" (1974), "Buddy Buddy" (1981), "JFK" (1991), "Grumpy Old Men" (1993) and its sequel "Grumpier Old Men" (1995), "The Grass Harp" (1995), and "Out to Sea" (1997).

Lemmon was seen adept at both comedy and drama. As a young man, he attended Harvard University and was president of an organization renowned for its annual satiric revues. During World War II, he served in the US Navy. He was able to graduate from Harvard in 1947, after which he moved to New York City. There he played piano and acted. He made his Broadway debut in a revival of the farce "Room Service" (1953). It was a flop; but, his performance led to a contract with Columbia Pictures in 1954.

Matthau as an actor was known for a rumpled face, nasal bray, and razor-sharp comic timing. As a young guy, he began playing bit roles on stage in Lower East Side NY theatres. During World War II, he served as a radioman-gunner. When he returned to New York, he attended the New School for Social Research (Dramatic Workshop). He got steady work as a character actor. In 1955, he made his motion picture debut as a whip-wielding bad guy in "The Kentuckian".