The Lucky Ladders presenter failed to recover after a fall at his home in Thornton, near Blackpool.
Bennett - real name Mike Berry - was famed for partnering Jerry Stevens on the BBC's Lennie And Jerry Show. He also presented Punchlines and Celebrity Squares.
Blackpool-based comedian Frank Carson paid tribute to the star. He told the Blackpool Gazette: "Lennie was an absolutely wonderful fellow and we had lots of laughs together.
"He was a very funny comedian and a very good performer."