STARS' WORST KISSES

They may look steamy on screen, but these actors admit that their makeout scenes were anything but romantic!

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ASHLEY TISDALE: Zac Efron

Whoa there, mister! “At the time, he was used to acting on, like, Warner Bros., which is the CW, and we were on Disney Channel,” Ashley, 40, recalled of Zac, 37, who tried to slip her the tongue during his 2006 guest spot on The Suite Life of Zack & Cody. “I was like, ‘Get away from me!’ I, like, closed my mouth so fast. I was like, ‘This is Disney Channel! We don’t kiss like that on Disney Channel!’”

AUSTIN NICHOLS: Mary-Kate Olsen