Trivia / No Kidding

• Billing Displacement: One of the posters adds Irene Handl, Joan Hickson, and June Jago to the list of stars.
• Completely Different Title: The film was released in Finland as At Sixes and Sevens.
• Fake American: Out of the four members of the Treadgold family, only Edgar, the father, was played by an American (Alan Gifford). The other three (Mrs. Treadgold, Dandy Big, and Dandy Little) were played by Brits (Marion Mathie, Michael Gowdy, and Janet Bradbury).
• Fake Irish: While Tandy is played by an Irishman (Noel Purcell), his grandson Will isn't and is instead played by the British Brian Rawlinson.
• Fake Nationality:
  • Hassan, Suleiman, and King and Queen Balzik are Middle Eastern, but the actors playing them (Keith Lacey, Mark Mileham, Eric Pohlmann, and Patricia Jessel) aren't.
  • Henri Dupont is a Frenchman played by the British Michael Sarne.
• Fake Scot: Angus is a Scot played by the British Martin Stephens.
• Production Posse:
  • Peter Rogers and Gerald Thomas reuse several actors from their Carry On... Series in this film, those being Leslie Phillips, Joan Hickson, Irene Handl, Esma Cannon, Cyril Chamberlain, and Brian Oulton.
  • Rogers and Thomas also reuse Julia Lockwood, who had previously starred in their 1959 film Please Turn Over.

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