Vivek plays super villain Kaal opposite to Hrithik's character of superhero Krrish in the film that has crossed over Rs.100 crore mark within four days of its release.
"I am over the moon now. I am so happy," Vivek told reporters Monday at Chandan theatre here. He was accompanied by Hrithik.
Vivek said there are three superheroes in the film.
"Second and the biggest superhero is his dad (Rakesh Roshan) who nurtured such a big dream... we as Indians have this - 'they are Americans, they can do and Indians can't (make successful sci-fi)'. But he (Rakesh Roshan) has proved to the whole world that Indians can do what the Americans can do. I think it is a great thing that he has done for India, for our pride," said Vivek.
"And the third superhero is our audiences," he added.