Gwyneth Paltrow
Daniel Craig
Jared Harris
Blythe Danner
Michael Gambon
Amira Casar
Andrew Havill
Lucy Davenport
Liddy Holloway
David Birkin

Gwyneth Paltrow as Sylvia Plath
Daniel Craig as Ted Hughes
Jared Harris as Al Alvarez
Blythe Danner as Aurelia Plath
Michael Gambon as Professor Thomas
Amira Casar as Assia Wevill
Andrew Havill as David Wevill
Lucy Davenport as Doreen
Liddy Holloway as Martha Bergstrom
David Birkin as Morecambe
Alison Bruce as Elizabeth
Julian Firth as James Michie
Jeremy Fowlds as Mr. Robinson
Michael Mears as Charles Langridge
Anthony Strachan as Michael Boddy (as Antony Strachan)