Once Is Not Enough offered a multiple-choice "audience participation" review, in which the reader was given four choices (ludicrous, bad, terrible, horrendous) by which to evaluate the movie. Despite the reviews, the film was a commercial success, earning $15.7 million at the box office (equivalent to $65.2 million in 2017). Brenda Vaccaro, as Linda Riggs, received an Oscar nomination for her performance. Once Is Not Enough Once Is Not Enough is the third novel by Jacqueline Susann, following her huge best sellers "Valley of the Dolls" (1966) and "The Love Machine" (1969). With "Once Is Not Enough," Susann became the first writer in publishing
Brian Kelly (actor) at the time as saying that he loved the role because of its family-friendly qualities. The success of "Flipper", which was filmed in Miami and the Bahamas, led to a brief movie career, including a lead in "Around the World Under the Sea" (1966). In 1970, Kelly sought to change his image by playing the role of Robin Stone in "The Love Machine", based on the novel by Jacqueline Susann. Just prior to filming, he was involved in a motorcycle accident which left his right arm and leg paralyzed. John Phillip Law took over the role. Kelly—whom Susann had called