Alvin Purple is a 1973 Australian sex comedy film starring Graeme Blundell in the title role; the screenplay was written by Alan Hopgood and directed by Tim Burstall, through his production company Hexagon Productions and Village Roadshow.

The film received largely negative reviews from local film critics. Despite this, it was a major hit with Australian audiences. Alvin Purple became the most commercially successful Australian film released to that time, breaking the box-office record previously set by Michael Powell's pioneering Anglo-Australian comedy feature They're a Weird Mob (1966), grossing $A4.7 million locally ($49 million in 2022).