structural:scholar_edition, stylistic:style_transfer
Final years: 1966–1983

In the 1960s, Hergé became increasingly annoyed at the success of René Goscinny and Albert Uderzo 's Asterix comic book series, which various commentators had described as eclipsing The Adventures of Tintin as the foremost comic in the Franco-Belgian tradition. Hoping to imitate the success of the recent animated films Asterix the Gaul (1967) and Asterix and Cleopatra (1968), Hergé agreed to the production of two animated Belvision films based on the Adventures of Tintin. The first, Tintin and the Temple of the Sun (1969), was based on pre-existing comics, whereas the second, Tintin and the Lake of Sharks (1972) was an original story written by Greg. In 1982, the US filmmaker Steven Spielberg requested the film rights for a live-action adaptation of one of The Adventures of Tintin, a prospect that excited Hergé, but the project never came to fruition at the time.

In a wide-ranging interview with the journalist Numa Sadoul in October 1971, Hergé opened up about many of the problems he had experienced in his personal life. Sadoul planned to publish the interview as a book, but Hergé made many alterations to the transcript, both to improve its prose and to remove sections which cast him in a negative light. Editors at Casterman then removed even further sections, particularly those in which Hergé expressed a negative view of Catholicism. The interview was published as Tintin et moi ("Tintin and Me") in 1975. Hergé followed this by agreeing to be the subject of a documentary film produced by Henri Roane, Moi, Tintin ("I, Tintin"), which premiered in 1975. In January 1977 he attended an early comic book convention at Angoulême, where he was widely heralded as one of the masters of the discipline. To mark the fiftieth anniversary of The Adventures of Tintin in 1979, a celebratory event was held at Brussels' Hilton hotel, while an exhibit on "Le Musée imaginaire de Tintin" ("The Imaginary Museum of Tintin") was held at the Palais de Beaux-Arts.

In April 1971 Hergé visited the U.S. for the first time, primarily to visit a liver specialist in Rochester, Minnesota; however, on the trip he also visited a Sioux reservation in South Dakota, but was shocked at the conditions in which their inhabitants lived. On this visit he also spent time in Chicago, San Francisco, Los Angeles, Las Vegas, and Kansas City. In April 1972 he travelled to New York City for an international conference on the strip cartoon, and there presented Mayor John Lindsay with a cartoon of Tintin visiting the city and also met with the pop artist Andy Warhol. Several years later, in 1977, Warhol visited Europe, where he produced a pop art portrait of Hergé. In April 1973, Hergé took up an invitation to visit Taiwan by the nation's government, in recognition of his promotion of Chinese culture in The Blue Lotus. During the visit he also spent time in Thailand and Bali.

Hergé had long sought to regain contact with his old friend Zhang Chongren, with whom he had lost contact. He regularly asked any Chinese people that he met if they knew of Zhang, and in 1979 had some success when a staff member in a Brussels Chinese restaurant revealed that he was Zhang's godson. Hergé was thus able to re-establish contact with his old friend. The journalist Gérard Valet organised for Zhang to visit Brussels so that he and Hergé could be re-united. The event took place in March 1981, and was heavily publicised; Hergé, however, found the situation difficult, disliking the press attention and finding that he and Zhang had grown distant during the intervening years.

In June 1970, Hergé's father died, and after the funeral he holidayed near Lake Geneva. In 1974, his assistant Branden suffered a stroke and was left unable to write, with Hergé replacing him with a young man, Alain Baran, who Hergé biographer Pierre Assouline later termed Hergé's "surrogate son". In March 1977, Hergé's divorce with Germaine was finalised; although Hergé continued to visit her and financially support her, Germaine took the divorce badly, viewing it as a further betrayal. Hergé was then able to marry Fanny several weeks later, in a low-key ceremony on 20 May; he was 70 years old and she was 42.