By Lynette Rice
Updated November 11, 2011 at 07:31 PM EST
Tim Mosenfelder/Getty Images

Welcome to the ’60s, Alice Cullen!

EW has learned exclusively that Ashley Greene (Alice from the Twilight franchise) has booked a three-episode arc on ABC’s period drama.

She’ll play a debutante with a past connection to Ted (Michael Mosley). She’ll appear in the episode titled “Kiss Kiss Bang Bang” that’ll air Dec. 4.

Breaking Dawn, the next installment in the Twilight franchise, opens Nov. 18.

Unlike some of ABC’s other freshman shows, Pan Am (8.25 million, 2.7 rating/7 in adults 18-49) has yet to receive a full season pickup. ABC has ordered more scripts for the show, but has been holding off on a pickup. But there’s a new showrunner at the helm and the show is doing well overseas.