After her film debut , National Lampoon 's Vacation in 1983 , Krakowski appeared in Fatal Attraction , The Flintstones in Viva Rock Vegas ( where she played Betty Rubble ) , Marci X , Alfie , Go , Cirque du Freak : The Vampire 's Assistant , Dance with Me , Stepping Out , Pretty Persuasion , Kit Kittredge : An American Girl , and Mom at Sixteen .
Krakowski made her movie debut in National Lampoon 's Vacation ; she has also appeared in Fatal Attraction , The Flintstones in Viva Rock Vegas ( where she played Betty Rubble ) , Marci X , Alfie , Go , Cirque du Freak : The Vampire 's Assistant , Dance with Me , Stepping Out , Pretty Persuasion , Kit Kittredge : An American Girl , and Mom at Sixteen .