Sam Rockwell has attracted thousands of supporters to an online campaign to get him an Oscar nomination for his role in Moon.
Duncan Jones, son of David Bowie, who directed the independent film about a man living alone on a space station, is avidly backing the campaign which has attracted support from celebrities including Simon Pegg, Noel Clarke and Chesney Hawkes.
Duncan has claimed on Twitter that he believes there to be a conspiracy by Sony to prevent the film from getting nominated, by not sending copies of Moon out to Oscar members with its Awards Season screening DVDs.
The director tweeted: "No Academy screeners sent out by Sony, so all I can hope for is that Academy voters HEAR about the film, and go about finding ways to see it by themselves!"
He added: "They say it costs too much for our little film as they would need to be water-marked copies as our DVD isn't out yet in the US.
"We have more than asked.. we've knocked heads. they have chosen the films they are backing and we are not in their plans.
"It's heart-breaking, to be honest. We all think Sam would have had a real shot at a nom, had it got the proper support.
"Best thing we can do is make a bit of a noise and get Academy voters to want to find the film and see it themselves."
The petition with over 3,000 signatories is posted on http://www.thepetitionsite.com/petition/957845687.
Duncan tweeted: "Just wanted to thank everyone yet again for keeping the Oscar nom for Sam Rockwell cause alive! Where there's a will, there IS a way!"