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 seeing the twenty-three-year-old model Miranda Quarry. The couple married on 24 August 1970, despite Sellers's private doubts—expressed to his agent, Dennis Selinger—about his decision to re-marry. On 20 April 1972, Sellers reunited with Milligan and Harry Secombe to record "The Last Goon Show of All", which was broadcast on 5 October. In May 1973, with his third marriage failing, Sellers went to the theatre to watch Liza Minnelli perform. He became entranced with Minnelli and the couple became engaged three days later, despite Minnelli's current betrothal to Desi Arnaz, Jr., and Sellers still being married. Their relationship lasted a month