Tom Hardy as Ronald Kray / Reginald Kray

Emily Browning as Frances Shea

Christopher Eccleston as Leonard 'Nipper' Read

David Thewlis as Leslie Payne

Taron Egerton as Mad Teddy Smith

Chazz Palminteri as Angelo Bruno

Colin Morgan as Frank Shea

Paul Bettany as Charlie Richardson

Tara Fitzgerald as Elsie Shea

Paul Anderson as Albert Donoghue

Nicholas Farrell as Dr Humphries

Duffy as Timi Yuro

Kevin McNally as Harold Wilson

John Sessions as Lord Boothby

Sam Spruell as Jack 'The Hat' McVitie

Millie Brady as Joan Collins

Charley Palmer Rothwell as Leslie Holt

Bob Cryer as Charles Kray Snr

Samantha Pearl as Shirley Bassey

Martin McCreadie as Eddie Richardson

Jane Wood as Violet Kray

Mel Raido as Ian Barrie

Adam Fogerty as Pat Connolly

Lorraine Stanley as Blind Beggar Barmaid

Shane Attwooll as George Cornell

Stephen Lord as Fuller

Tim Woodward as Superintendent Cummings

Chris Mason as Ronnie Hart

Frankie Fitzgerald as Jack Dickson

Sam Hoare as Stefan De Faye

Joshua Hill as Constable Scott

MAJOR. as The Double R Club Singer

Christopher Adamson as Philip Testa

Lara Cazalet as Mrs Payne

Nick Hendrix as Hew McCowan

Ashley Byam as John

John Sears as Father Foster

Robin Hooper as Prison Doctor (uncredited)

John Carr as Guest at Club (uncredited)

Julia Papp as Casino Guest (uncredited)

Tim Faraday as Big Screw

Amaëlle Cunningham as Isabella Rose

JD Roth-Round as Orderly R.White (uncredited)

Stephen Parker as D Trodden the Butcher (uncredited)