- King John – King of England
- Queen Eleanor – his mother, widow of Henry II
- Prince Henry – his son, later King Henry III
- Blanche of Castile – John's niece
- Earl of Essex – English noble
- Earl of Salisbury – English noble
- Earl of Pembroke – English noble
- Lord Bigot – Earl of Norfolk
- Peter of Pomfret – a prophet
- Philip Faulconbridge – also known as Philip the Bastard and Richard Plantagenet; illegitimate son of Richard I
- Robert Falconbridge – his half brother; legitimate son of Sir Robert Faulconbridge
- Lady Falconbridge – their mother; widow of Sir Robert Falconbridge
- James Gurney – her attendant
- Lady Constance – widow of Geoffrey II, Duke of Brittany
- Arthur – her son, King John's nephew, claimant to the English throne and eventual Duke of Bretagne
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- Sheriff
- Two Executioners
- English Herald
- English Messenger
- King Philip – King of France
- Louis the Dauphin – his son
- Viscount of Melun
- Chantillon – French ambassador to England
- Hubert – citizen of Angers and later a follower of King John
- Citizen of Angiers
- French Herald
- French Messenger
- Limoges, Duke of Austria
- Cardinal Pandolf – legate from Pope Innocent III
- Lords, soldiers, attendants etc
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