Maurice Flitcroft used to practise his golf on the playing fields of the local grammar school as he was banned from all golf courses in the area.
The real James Flitcroft (One of Maurice's twin sons played in the movie by Jonah Lees) makes a cameo appearance in the movie as someone who cheers Maurice on, he is credited as 'Drunk Man 1'.
Maurice Flitcroft was in his mid 40s when the events of this film took place, making him about 15 years younger than Mark Rylance, the actor who portrays him.
Ross Forder (Lambert's Caddy) is thanked in the final credits: Whilst acting together on set writer Simon Farnaby (Lambert) asked Forder for ideas for the closing lines of Flitcroft's meeting with Ballesteros. Sir Mark Rylance's inadvertent response of 'hasta cojones' to Marc Bosch's 'hasta entonces' was embraced by both the writer and director and later used as the gag to send off the trailer.
Simon Farnaby, the actor/writer who adapted the novel this film is based on into the screenplay, makes a cameo as the big, quiet, blonde, French participant who looks on in despair at Flitcroft during the 1976 Open.