Actor Zac Efron knew girlfriend VANESSA HUDGENS was the lady for him as soon as they met. The 19-year-old star met 18-year-old Hudgens at the casting for Disney hit movie High School Musical, and admits he instantly fell for his future co-star. He says, "For all of the partner things, me and Vanessa always got paired up. "I was like, 'They're not trying us with other people.' For some reason we kept sticking around (for callbacks). I don't know what it was with Vanessa, but we kind of clicked from the very beginning."