According to The Hollywood Reporter, Ali Larter, David Carradine, Tom Arnold, Talia Shire and newcomer Hayes MacArthur have joined the cast of indie Homo Erectus: A Caveman Comedy.

Writer, director and star Adam Rifkin already has boarded the project, which is being financed by Burnt Orange Prods.

The film centers on Ishbo (Rifkin), a philosophical caveman who loves Fardart (Larter), but she only has eyes for Ishbo's studly, dimwitted brother, Thudnik (MacArthur). Carradine and Shire will play Ishbo's parents, while Arnold will play Rog, a gay caveman.