Spider-Man 3 star Topher Grace refuses to appear in a spin-off movie of the Spider-Man franchise as his character Venom, because he thinks it would flop.

The actor plays the enemy of Spider-Man in the latest installment of the superhero movie.

But he's not interested in making the anti-hero have its own dedicated movie, because spin-off superhero movies like Electra (2005) and Supergirl (1984) haven't been very popular - reports Moviehole.com.

Grace says, "Those haven't really worked very well have they?"