I, Claudius

Derek Jacobi

Claudius

George Baker

Tiberius

Margaret Tyzack

Antonia

Siân Phillips

Livia

James Faulkner

Herod Agrippa

Brian Blessed

Augustus

John Hurt

Caligula

Fiona Walker

Agrippina

Kevin McNally

Castor

Patrick Stewart

Sejanus

Patricia Quinn

Livilla

Bernard Hepton

Pallas

Sheila White

Messalina

John Cater

Narcissus

David Robb

Germanicus

Kevin Stoney

Thrasyllus

Freda Dowie

Caesonia / The Sibyl

Frances White

Julia

Jo Rowbottom

Calpurnia

Moira Redmond

Domitia

Sam Dastor

Cassius Chaerea

Norman Eshley

Marcus Vinicius

John Rhys-Davies

Macro

John Castle

Postumus

Anne Dyson

Briseis

Bernard Hill

Gratus

Lockwood West

Senator

Michael Segal

Quaestor

James Fagan

Asprenas

Ian Ogilvy

Drusus

Renu Setna

Musa

Sheila Ruskin

Vipsania

Michael Hawkins

Rufus

Christopher Guard

Marcellus

John Paul

Agrippa

Angela Morant

Octavia

Carleton Hobbs

Aristarchus

Guy Siner

Pylades

Earl Rhodes

Gaius

Patrick Drury

Courier

Simon MacCorkindale

Lucius

Katharine Levy

Livilla

Esmond Knight

Domitius

Michael Clements

Herod

Diane Hutchinson

Agrippina

Nicholas Willatt

Courier

Gary Lock

Germanicus

Norman Shelley

Horace

Donald Eccles

Pollio

Denis Carey

Livy

Carol Gillies

Camilla

Jonathan Burn

Fabius

James Bree

Montanus

Graham Rowe

Junius

Stratford Johns

Piso

Irene Hamilton

Plancina

Roy Purcell

Vitellius

George Pravda

Gershom

Patsy Byrne

Martina

Robert Craig-Morgan

Caligula

Isabel Dean

Lollia

Edward Jewesbury

Titus

Liane Aukin

Aelia

Charles Kay

Gallus

Kate Lansbury

Apicata

John Franklyn-Robbins

Atticus

Alfonso Di Lieto

Junius

Katherine Hughes

Arria

Karin Foley

Helen

Pat Gorman

Captain of the Guard

Jon Laurimore

Lentulus

Douglas Melbourne

Gemellus

Arthur Whybrow

Stonemason

Bruce Purchase

Sabinus

Norman Rossington

Sergeant

Sally Bazely

Poppaea

Gina Manicom

Iris

Jan Carey

Diana

Lyndon Brook

Silanus

John Bennett

Xenophon

Geoffrey Hinsliff

Rufrius

Neal Arden

Cestius

George Little

Tortius

Stuart Wilson

Silius

Nicholas Amer

Mnester

Manning Wilson

Marsus Vibius

George Innes

Quintus Justus

Linal Haft

Geta

Charlotte Howard

Scylla

Barbara Young

Agrippinilla

Graham Seed

Britannicus

Peter Bowles

Caractacus

Jim Carter

Roman Senate Senator (uncredited)

Robert Bateman

Singer