Terry Southern of the Monty Python team. Cleese later described McGrath as having "no idea of comedy structure" and complained that the film ended up as "a series of celebrity walk-ons." The film was shot in London between February and May 1969. The cast was headed by Sellers (as Guy Grand) and Ringo Starr as his son Youngman Grand (a new character created for the movie), with cameo appearances by Spike Milligan, Christopher Lee, Laurence Harvey, Raquel Welch, Roman Polanski and Yul Brynner. As with "Dr Strangelove", Sellers habitually improvised on the script during filming. During production McGrath and Southern discussed a
Peter Sellers sufficient control of the accent, and started shooting the scenes in the aeroplane. After the first day's shooting, Sellers sprained his ankle while leaving a restaurant and could no longer work in the cramped cockpit set. Kubrick then re-cast Slim Pickens as Kong. The three roles Sellers undertook were distinct, "variegated, complex and refined", and critic Alexander Walker considered that these roles "showed his genius at full stretch". Sellers played Muffley as a bland, placid intellectual in the mould of Adlai Stevenson; he played Mandrake as an unflappable Englishman; and Dr. Strangelove, a character influenced by pre-war German cinema, as