Ashley Tisdale: 'Vanessa Hudgens and Zac Efron Are a Great Couple'

Ashley Tisdale has blasted rumors her High School Musical co-stars are jealous of the romance between Zac Efron and Vanessa Hudgens, insisting their relationship did not cause any problems on-set.

"Vanessa and Zac are a great couple. We're all like brothers and sisters on the set so there's no jealousy about their romance," Tisdale says of the pair -- who began dating after they appeared together in the first installment of the Disney film franchise. "It's very sweet to see them so romantic and none of us mind seeing them like this together.

"They are as much in love off-screen as they are in HSM. There's such a great chemistry that it is like a fairytale."