The following people are credited as replacements or additions if they were not credited on opening night.

Michael Allinson	The Earl of Caversham
Stephanie Beacham	Mrs. Cheveley
Holly Cate	Lady Jane Barford
Rufus Collins	James Footman at Sir Robert Chiltern's
Cheryl Gaysunas	Miss Mabel Chiltern Sir Robert Chiltern's Sister
Nicky Henson	Lord Goring The Earl of Caversham's Son
Kim Hunter	Lady Markby
Madeleine Potter	Lady Chiltern Sir Robert Chiltern's Wife
James Warwick	Sir Robert Chiltern Under Secretary for Foreign Affairs

Understudies: Holly Cate (Miss Mabel Chiltern, Mrs. Marchmont), Rufus Collins (Mason, Vicomte de Nanjac).