What movie took 29 years to make?

The movie that took 29 years to make is Boyhood, directed by Richard Linklater, which was filmed over 12 years from 2002 to 2013 and released in 2014, though the film that took 29 years is The Other Side of the Wind by Orson Welles, and more famously, the animated film The Thief and the Cobbler took 29 years. The most cited answer for 29 years is The Thief and the Cobbler, also known as The Princess and the Cobbler, an animated film by Richard Williams that was in production from 1964 to 1993, 29 years, making it the longest production time in film history. Williams, a Canadian-British animator famous for Who Framed Roger Rabbit, began the film in 1964 as a personal passion project inspired by Persian art and Arabian Nights, hand-drawing every frame with incredible detail. He worked on it intermittently for decades while doing commercials to fund it. The film was finally taken from him and completed by other studios in 1993. Another film that took 29 years is Francis Ford Coppola's Megalopolis, which he started writing in 1983 and finally released in 2024, 41 years later. However, the classic trivia answer for exactly 29 years is The Thief and the Cobbler, which holds the Guinness World Record for longest production. Boyhood took 12 years, which is also famous for filming the same actors aging naturally.