Jaws (1975) was a blockbuster film that had a production budget of $7 million but grossed $260 million at the US box office alone. It had difficulties during production that extended filming from two months to five months. Universal Pictures heavily promoted the film with a "media blitz" including TV ads, paperback book promotions, and pre-opening marketing spending of $1.8 million. The film was a massive commercial success, making $14 million in its first week and becoming the highest-grossing film of all time by September 1975.