Michelle Pfeiffer and Zac Efron form an unlikely duo in New Year's Eve. Michelle plays a reserved receptionist and Zac is a smooth-talking bike messenger whose paths happen to collide on the holiday, but this isn't the first time the pair have teamed up on the big screen. They also costarred in Hairspray a few years ago, and when we caught up with them at the recent press day for their latest film, Zac admitted to feeling a little nervous around Michelle back then. This time, however, he played a big role in pulling his leading lady out of her shell with a scene they improv'd at the last minute! Check out our interview to hear about the cute moment and catch New Year's Eve when it hits theaters on Dec. 9.