Barry wrote or rewrote screenplays for several notable films including The River, Eyes of Laura Mars, and Rhinoceros, Me, Myself and I, and A Marriage - Georgia O'Keeffe and Alfred Stieglitz (PBS/American Playhouse Production).
The prospects for the project were reportedly harmed by the commercial success of Love Story, having created a demand for romantic films, which Lenny certainly was not.
[7] In 1983, Barry wrote the book for Jean Seberg, a musical biography of the American actress and political activist who committed suicide in Paris in 1979.
Later he co-authored an opera with Peter Hall, Born Again at the Chichester Festival Theatre in England starring Mandy Patinkin and José Ferrer.
Barry met his second wife, Patricia Foley when he hired her for a Chicago production of Guys and Dolls to play the role of Sister Sarah Brown, opposite Tony Bennett.
Barry died at his home in Beverly Hills, California, on July 25, 2023, at the age of 92, from complications of heart failure and kidney disease.