The Lee Strasberg Theatre & Film Institute is an acting school founded in 1969 by actor, director, and acting teacher Lee Strasberg. The Institute is located in Union Square on East 15th Street, also known as Lee Strasberg Way, in New York City, New York. The school has a secondary campus located in Los Angeles, California.

Lee Strasberg was an American theatre director, actor and acting teacher. He co-founded, with theatre directors Harold Clurman and Cheryl Crawford, the Group Theatre in 1931, which was hailed as "America's first true theatrical collective". In 1951, he became director of the nonprofit Actors Studio in New York City, considered "the nation's most prestigious acting school," and, in 1966, was involved in the creation of Actors Studio West in Los Angeles.