Zac Efron & Michelle Pfeiffer Cozy Up... On A Motorcyle!

We can only guess what's going on during the filming onset of next year's New Year's Eve – the cast keeps growing with more and more celebs! Apparently, Zac Efron and Michelle Pfeiffer share a motorcycle scene, as they were caught filming in NYC donning helmets, goggles and leather jackets today. Vroom!

OK! GALLERY: NEW YEAR'S EVE CAST GETS TRASHY IN NYC

Zac seemed to have been enjoying the ride, while Michele looked a little nervous. They don't teach you how to ride motorcycles in film school, apparently!

OK! GALLERY: A DAPPER ZAC EFRON HITS THE BIG APPLE TO FILM

The Gary Marshall directed rom com set for next year's holiday season will the big screen debut of Glee's Lea Michele, as well as play host to a whole slew of big names, in the tradition of last year's Valentine's Day.