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 '' , ' , `` Dance with Me '' , `` Stepping Out '' , `` Pretty Persuasion '' , ' , 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 '' , ' , `` Dance with Me '' , `` Stepping Out '' , `` Pretty Persuasion '' , ' , and `` Mom at Sixteen '' .