Year Title Role Notes 1994 Muriel's Wedding Rhonda Epinstall 1996 Così Lucy 1996 Jude Arabella 1996 Children of the Revolution Anna 1997 My Son the Fanatic Bettina/Sandra 1997 My Best Friend's Wedding Samantha Newhouse 1998 Among Giants Gerry 1998 Hilary and Jackie Hilary du Pré 1998 Amy Tanya Rammus 1998 Divorcing Jack Lee Cooper 1998 Tulip Writer and Director 1999 Me Myself I Pamela Drury 2001 Very Annie Mary Annie Mary Pugh 2001 Blow Ermine Jung 2001 Blow Dry Sandra 2002 Hard Word, TheThe Hard Word Carol 2002 Rookie, TheThe Rookie Lorri Morris 2003 Ned Kelly Susan Scott 2006 Step Up Director Gordan 2009 Beautiful Kate Sally 2011 Burning Man Miriam 2012 Underground: The Julian Assange Story Christine Assange 2013 Patrick Matron Cassidy 2013 Saving Mr. Banks Aunt Ellie 2016 Mammal Margaret 2016 Hacksaw Ridge Bertha Doss 2016 Science Fiction Volume One: The Osiris Child General Lynex 2017 The King's Daughter Abbess Post-production