The Wedding Party is a 1969 American film farce created as a joint effort by Sarah Lawrence College theater professor Wilford Leach and two of his students, protégé Brian De Palma and Cynthia Munroe.

The film focuses on a soon-to-be groom and his interactions with various relatives of his fiancée and members of the wedding party prior to the ceremony at the family's estate on Shelter Island, New York.

• Velda Setterfield as Mrs. Fish
• Raymond McNally as Mr. Fish
• John Braswell as Reverend Oldfield
• Charles Pfluger as Charlie
• Jill Clayburgh as Josephine
• William Finley as Alistair
• Jennifer Salt as Phoebe
• Robert De Niro (credited as Robert Denero) as Cecil

The film was made in 1963. It was bankrolled by Stanley Borden, owner of American Films and De Palma's mentor and employer, who allowed De Palma to produce the film on company time.^{[citation needed]}

The on-screen copyright year is 1966. However, owing to a legal dispute between 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 1968 release Greetings.

Leach went on to a successful career as a Tony Award-winning theatre director, while De Palma continued as a well-known film director.

The Wedding Party was released on DVD from Troma Entertainment, and on Blu-ray by Arrow Films on December 11, 2018, as part of the De Niro and De Palma: The Early Films collection. The set also includes the films Greetings (1968) and Hi, Mom! (1970), which are both directed by De Palma and star De Niro.

• List of American films of 1969

• The Wedding Party at IMDb
• The Wedding Party at Box Office Mojo
• The Wedding Party at Rotten Tomatoes
• The Wedding Party at the TCM Movie Database
• The Wedding Party at the AFI Catalog of Feature Films
• New York Times review