The fantasy films have plenty of fans, but Cudmore says it's nothing compared to the reaction to the Twilight series.
"It's more intense, there's so much more passion," he said.
"I think maybe because it's a newer phenomenon, whereas X-Men has been around for such a long time through the comic books and the movies."
Cudmore's character Felix is a Volturi thug whose day-to-day job is "tearing apart other vampires".
He says Felix is a nasty piece of work, but a joy to play.
"He's an angry vampire, he doesn't really get much respect, and he's been around for thousands of years ... and he's just really, really good at what he does," Cudmore said.
"It's a fun character - it's fun to play someone dark, who goes on the animal side and enjoys it."
The physical role included a fight scene with Robert Pattinson, who plays Edward.
Pattinson is a heartthrob to Twilight fans the world over, but Cudmore said the handsome actor was keen to do as much of his own stunt work as possible.
"Rob's a great guy, he's really game for anything," Cudmore said.
"He was nervous at first, because he was like, `you know I'm not the most athletic guy out there, I don't think I'm going to be able to do this'.
"After rehearsing for a few hours he was really, really having a good time with it. He had a blast."