Harry Shearer is suing entertainment group Vivendi claiming it has hidden profits from film This is Spinal Tap from him and others.
The 72-year-old actor is taking legal action against the mass media conglomerate accusing the company of creating a "fraudulent campaign" to hide revenue and deny profits from the cult 1984 musical comedy film.
In a video posted on Twitter, Shearer - who played Derek Smalls in the film - said: "Today, I have filed a lawsuit against Vivendi and Vivendi's agents for fraud related to the movie This is Spinal Tap. Filing a claim like this one is neither fun nor easy. Going up against a major multi-national [company] is not nearly as fun as playing too loud in Carnegie Hall.
"But people who are squashed by major corporations can't fight back unless they have significant resources of their own. I'm incredibly fortunate to be able to fight back.