Steve Buscemi, John Cleese and Jay Leno have joined the voice cast of Exodus Film Group´s computer-animated short film "Igor: Unholy Frijoles".

The actors also are in talks to voice roles in Igor, Exodus´ upcoming feature-length computer-animated film. Igor: Unholy Frijoles is the prequel to Igor, an animated comedy revolving around mad scientists and monsters due out in 2007.

Christian Slater will give voice to Igor, a mad scientist´s hunchbacked lab assistant who dreams of winning the coveted first-place award at the annual Evil Science Fair and becoming a mad scientist in his own right.

Buscemi will voice the part of Scamper, a super-intelligent and sarcastic lab rabbit, and Cleese will voice Dr. Glickenstein, Igor´s evil master. Leno is voicing Brian the Brain.

Both the "Igor" short and feature were written by Chris McKenna.

A thread is open in the forum to talk about these projects. Variety hosts further updates.