Kitty Kelley ... Self - Investigative Author

Tony Curtis ... Self - Actor, Friend of Dodi (archiveFootage)

Michael Mansfield ... Self - Counsel to Mohamed Al Fayed (as Michael Mansfield QC)

Laurie Taylor ... Self - Sociologist (as Professor Laurie Taylor)

Noel Botham ... Self - Author, The Murder of Princess Diana

Lauren Booth ... Self - Journalist / Tony Blair's Sister-in-Law

Richard Wiseman ... Self - Undercover Reporter

Oliver James ... Self - Clinical Psychologist

Rest of cast listed alphabetically:

Scott Baker ... Self (as Lord Justice Scott Baker)

Graham Bowe ... Professor Robert Forrest

Piers Brendon ... Self - Historian (as Dr Piers Brendon)

Michael Burgess ... Self - Deputy Coroner of the Queen's Household in 1997 (creditOnly) (as Michael Burgess OBE)

Jeremy Clyde ... Michael Mansfield QC

Richard Dearlove ... Self - Head of British Secret Intelligence in 1997 (creditOnly) (as Sir Richard Dearlove)

Fabrice Dubest ... Self - French Lawyer

Stephen Haseler ... Self - Founding Member of 'Republic' (as Professor Stephen Haseler)

Dominique Lecomte ... Self - French Pathologist (creditOnly) (as Professor Dominique Lecomte)

Euan Macnaughton ... Richard Keen QC

John Morgan ... Self - Investigative Author (archiveFootage) (voice)

Christopher Owen ... Lord Justice Scott Baker

Daphne Park ... Self - Former MI6 Senior Agent (voice) (as Baroness Daphne Park)

Simone Simmons ... Self - Friend of Diana, Princess of Wales

John Stevens ... Self - Metropolitan Police Commissioner 2000-2005 (creditOnly) (as Lord Stevens)

Richard Tomlinson ... Self - Former MI6 Officer

Bill Clinton ... Self - President of the United States of America (uncredited) (archiveFootage)

Natasha Kaplinsky ... Self - BBC Newsreader (uncredited) (archiveFootage)

Henri Paul ... Self - Deputy Head of Security, Hôtel Ritz Paris (uncredited) (archiveFootage)

Prince Charles ... Self - His Royal Highness The Prince of Wales (uncredited) (archiveFootage)

Prince Philip ... Self - Duke of Edinburgh (uncredited) (archiveFootage)

Princess Diana ... Self - The Princess of Wales (uncredited) (archiveFootage)

Queen Elizabeth II ... Self - Princess Elizabeth / Her Majesty the Queen (uncredited) (archiveFootage)