Guest Stars Harry Hadden-Paton as Martin Charteris Will Keen as Michael Adeane Pip Torrens as Tommy Lascelles Lizzy McInnerny as Bobo Macdonald Chris Gordon as Duke of Edinburgh's Valet Daniel Ings as Mike Parker Nicholas Rowe as Jock Colville Harriet Walter as Clemmie Churchill Jonathan Newth as Page (Buckingham Palace) David Shields as Colin Tennant Patrick Drury as Lord Chamberlain Thomas Padden as Page (Clarence House) Steven Blake as Buckingham Palace Press Secretary Nick Hendrix as Billy Wallace Josh Taylor as Johnny Dalkeith Peter Wight as Newspaper Editor Angela Sims as Princess Margaret's Dresser John Rowe as Chief Telephonist (Buckingham Palace) Paul Thornley as Bill Mattheson Julius D'Silva as Baron Nahum Ed Stoppard as Tony Langdon Robin Bowerman as Page (Rhodesia) Ben Fox as Princess Margaret's Private Secretary David Gillies as Telephonist (Clarence House) Jeannie Kinkaid as Telephonist (Sandringham Stables) Clive Arrindell as Newspaper Proprietor