Acting

—		This Is Not an Attack on Your Parenting
—		And Mrs

2023

as Letizia Bonaparte

2022

as Self

2020

as Self

2018		National Theatre Live: King Lear as Kent
2018		Beast as Penelope

2015

as Grace Rohan

2014

as Mrs. Pike

2013

as Anna Morden

2012

as Clea

2009

as Miss Nieven

2007		A Room with a View as Miss Lavish
2007		Eastern Promises as Helen

2006		The Tiger's Tail as Oona O'Leary
2006		V for Vendetta as Delia Surridge
2006		Mathilde as Wife of Col. De Petris

2005		Summer Solstice as Elfrida
2005		The Strange Case of Sherlock Holmes & Arthur Conan Doyle as Mary Doyle
2005		Dad as Sandy James

2003		Winter Solstice as Elfrida Phibbs
2003		I Capture the Castle as Mrs Cotton

2001

as Kathleen

2000		My Mother Frank as Frances 'Frank' Kennedy
2000		Passion of Mind as Jessie

1998

as Brenda O'Boyce

1997

as Jennie Lee

1996

as Diana Grayson

1995

as Menchu

1994

as Matilde

1993		Bad Behavior as Ellie McAllister
1993		The Cement Garden as Mother

1992		God on the Rocks as Ellie Marsh
1992		Tales from Hollywood as Nelly Mann
1992		Waterland as Mary Crick

1989		The Hen House as Lily
1989		Venus Peter as Miss Balsilbie

1988

as Amanda 'Billi' Rockwell (as Sinead Cusack)

1985

as Roxanne

1980

as Olivia

1977		The Kitchen as Monique
1977		The Last Remake of Beau Geste as Isabel Geste

1975

as Rosaline

1974

as Margaret Flaherty (Pegeen Mike)

1973		Horowitz in Dublin as Liz
1973		The Eyes Have It as Sally

1971

as Rose

1970		Tam Lin as Rose
1970		The Rise and Rise of Michael Rimmer as Yvonne (Uncredited)
1970		The Dolly Scene as Anna
1970		A Sound from the Sea as Catherine
1970		Hoffman as Miss Smith

1969

as Emily