Trivia

Though he received an 'introducing' credit, Australian actor Gerry Sont had actually appeared in two Aussie feature films - 'Early Frost' (1982) and 'Running on Empty' (1982) - as well as four home-grown television series - 'Waterloo Station', 'The Young Doctors', 'Glenview High' and 'A Country Practice'.

Melvin's year of birth according to the title song was 1966. His actual date of birth according to a chart at the end of a hospital bed in the film was 23rd May 1966. This made the character approximately eighteen years of age at the time the movie was released. Official publicity for the picture as in the press sheet specifically stated the character was nineteen years of age. His height and weight as an infant at birth according to the chart was 18.5 inches / 7 lb 2 oz.

The name of the television news segment about Alvin Purple (Graeme Blundell) that Dee Tanner (Tina Bursill) reported on was ''The Sexiest Man On Earth?''.

Alvin Purple actor Graeme Blundell said of this film in his auto-biography 'The Naked Truth: A Life in Parts' (2008): ''In the mid eighties, horribly, inevitably Alvin returned. It was an idea of [my then wife] Margot's offered at a dinner party. 'Why not do the middle-aged Alvin?' she suggested, never having seen the earlier movies.'' He continued: ''Melvin, Son of Alvin was like the earlier films: sexist, racist, vulgar and crass, and it carried a few good jokes. I hated filming it, but after asking for [AU] $100,000, Bill Shanahan got somewhere around $70,000, which was enough with Margot's father, to get a mortgage on the Surrey Street house. John Eastway directed competently enough a script written by Morris Gleizman. My own performance was most certainly that of someone doing it for the money, though there was no truth in the rumour that during filming a taxi was kept running at the studio door. 'Grab the dough,' Shanahan said. 'There mightn't be another chance'.''

Alan Hopgood, creator of the Alvin Purple character and screenwriter on the first two 'Alvin Purple' pictures, was not credited for character(s) in this movie's credits.

Kylie Foster: The 'Centrespread' star as a girl at the cinema who asks Melvin to come with her to the back of the theatre if she gives him some popcorn.