Being There

Being There is a movie starring Peter Sellers, Shirley MacLaine, and Melvyn Douglas. A simpleminded, sheltered gardener becomes an unlikely trusted advisor to a powerful businessman and an insider in Washington politics.
A simple-minded gardener named Chance has spent all his life in the Washington D.C. house of an old man. When the man dies, Chance is put out on the street with no knowledge of the world except what he has learned from television.