"I was so nervous. He was sort of my God. It was at the Sunset Towers, I was 17 or 18, I idolised him at this point. I stopped him and told him, 'Seth, I have to tell you I'm a huge fan.'" High School Musical hunk Zac Efron, 26, was star-struck meeting Knocked Up comedian Seth Rogen for the first time. The pair has since teamed up to star in new comedy Neighbours.