The Wedding Party (1969) was made in 1963, with the on-screen copyright year being 1966. However, owing to a legal dispute between Brian De Palma and Borden over the rights to the film (Borden thought it was not ready for release, and De Palma insisted on final cut), the film was not released until 1969, after one of its supporting players, Robert De Niro, had begun to draw notice for his work in off-Broadway theatre and De Palma's release Greetings (1968).
The Wedding Party (1969) was created by a joint effort by Sarah Lawrence theater professor Wilford Leach and two of his students, protégé Brian De Palma and Cynthia Munroe. It was bankrolled by Stanley Borden, owner of American Films, De Palma's mentor and employer, who allowed De Palma to produce the film on company time. Leach went on to a successful career as a Tony Award-winning theatre director, while De Palma continued as a well-known film director.