A Good Old Fashioned Orgy is a 2011 American comedy film written and directed by Alex Gregory and Peter Huyck. It stars Jason Sudeikis, Leslie Bibb, Lake Bell, Michelle Borth, Nick Kroll, Tyler Labine, Angela Sarafyan, Lindsay Sloane, Martin Starr, Lucy Punch and Will Forte. The main plot follows Eric, who, having thrown parties at his father's house for years, decides to have one last party when the house is to be sold: an orgy.

The world premiere of A Good Old Fashioned Orgy was held at the 2011 Tribeca Film Festival in New York City on April 29, 2011. The film received a limited theatrical release in the United States on September 2, 2011.