Zac Efron's on-screen kiss with Michelle Pfeiffer "wasn't very sexy."

The High School Musical hunk - who appears alongside the actress in new ensemble movie New Year's Eve - admitted locking lips with the star didn't go as smoothly as he had hoped, and he ended up having to "spit" on the floor right before the smooch.

"Those things are best to do spontaneous. Have fun and be in the moment. I definitely thought about how it was going to go down. In my mind, the way I pictured it, it was going to be perfect, very romantic, very leading man. Then of course, as we went to film it, right when I went to dip her, a huge piece of confetti went straight into my mouth. I didn't want to finish the kiss like that, so I spit and went for it. That's actually in the movie."

"It wasn't very sexy, but it was cute," Michelle added.