The National Lampoon, Burnt Orange Productions and University Of Texas Film Institute co-production premiered at Slamdance this year and will be released in September as National Lampoon's Homo Erectus.
Rifkin wrote, directed and stars in the comedy about a brilliant caveman who invents the toilet, the spoon, and trousers, yet is constantly dismissed by his friends as a fool.
Ali Larter also stars as the love interest. Cast members include David Carradine, Gary Busey, Talia Shire, and Hayes Macarthur.
Brad Wyman and Carolyn Pfeiffer produced and Tom Schatz served as executive producer.
'We are thrilled to be partnering with the likes of Brad and Adam on such a unique and exciting feature for National Lampoon,' Tom Daniels, National Lampoon's president of worldwide distribution, said. 'These are the kind of film-makers that we look forward to being in business with.'
'Having National Lampoon's stamp of approval is a lifetime dream come true,' Rifkin added. 'One of my favorite movies of all time is National Lampoon's Animal House, and for Homo Erectus to become a part of that legacy of film comedy is an honour beyond words.'