Nicole Kidman got cuddly with her co-stars, including Zac Efron ... part of her hair pinned back loose, with the rest of her blonde locks flowing down her shoulders. Meanwhile, Efron looked ...

guesses that it's due to his hair color. Check out Tisdale's story below: "About a year ago maybe, my husband showed her, and I was like, 'What are you doing?' And she thought Zac Efron was her dad.