The actor told Metro that he enjoyed kissing Michelle Pfeiffer in New Year's Eve and Nicole Kidman in upcoming coming-of-age period drama The Paperboy.
Of kissing Pfeiffer, he said: "It's everything you've dreamed of. It was amazing and one of the best parts of the movie for me. I've always wanted to kiss her and I checked it off my bucket list."
Asked if he had a crush on her growing up, he added: "Yeah, I still do."
Efron previously revealed that he was "100% in" for the part in New Year's Eve when he heard Pfeiffer was signed on, having previously worked with her on 2007's Hairspray.
Of kissing Kidman, Efron said: "It was great and fun. I'm a kissing machine!"
Watch a trailer for New Year's Eve below: