Zac Efron: `Kissing Michelle Pfeiffer is best part of new movie`

While Efron might only be 24 and Pfeiffer is 29 years older at 53, the young star insists he was thrilled to lock lips on the set of their new movie New Year's Eve.

When US morning show Today host Matt Lauer quizzed the co-stars, asking them if their near 30 year age gap made it an awkward moment, Efron immediately jumped in.

'Are you kidding? It's the best part in the movie!' he exclaimed.

The co-stars then revealed that the kiss was originally not scripted, and it was them who came up with the idea themselves.

Efron added, 'It turned out to be really fun. It was kind of our idea. We really wanted to spice it. But Pfeiffer said at first she was a little nervous about the scene, adding, 'It is always a little bit nerve racking those scenes.

'I think we started out thinking it was going to be a little more of a shock than it ends up being.'

Despite declaring kissing Pfeiffer as his favourite part of the film, Efron has said that the actual action wasn't as passionate as he thought would be, all thanks to him.

He later told Hollywood Access, '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.'

Pfeiffer added, 'It wasn't very sexy but it was cute!'