O'Brien was born in
Oakland, California. He first left home at the age of eleven to work on cattle ranches, and again at the age of thirteen when he took on a variety of jobs including farmhand, factory worker, fur trapper, cowboy, and bartender. During this time he also competed in rodeos and developed an interest in dinosaurs while working as a guide to
palaeontologists in
Crater Lake region. He spent his spare time sculpting and illustrating and his natural talent led to him being employed first as draftsman in an architect's office and then as a sports cartoonist for the
San Francisco Daily News. During this time he also became a professional boxer, winning his first nine bouts but retiring after an unsuccessful tenth. He subsequently worked for the railroad, first as a brakeman and later a surveyor, as a professional
marble sculptor, and was assistant to the head architect of the
1915 San Francisco World's Fair, where some of his work was displayed. During this time he made models, including a dinosaur and a caveman, which he animated with the assistance of a local newsreel cameraman. San Francisco exhibitor Herman Wobber saw this 90-second test footage and commissioned O'Brien to make his first film,
The Dinosaur and the Missing Link: A Prehistoric Tragedy (1915) for a budget of $5,000.
Thomas Edison was impressed by the film and O'Brien was hired by the Edison Company to animate a series of
short films with a
prehistoric theme, these included
R.F.D. 10,000 B.C. and
Prehistoric Poultry (both 1917) released as part of
Conquest Pictures film packages for youth audiences. During this time he also worked on other Edison Company productions including Sam Loyd's
The Puzzling Billboard and ''
Nippy's Nightmare'' (both 1917), which were the first stop-motion films to combine live actors with stop motion models. These films led to a commission from Herbert M. Dawley to write, direct, co-star and produce the effects for another dinosaur film,
The Ghost of Slumber Mountain (1918), for a budget of $3,000. The collaboration was not a happy one and Dawley cut the 45-minute film down to 11 minutes and claimed credit for O'Brien's pioneering effects work, which combined realistic stop-motion animated prehistoric models with live action. The film grossed over $100,000 and Dawley used the cut effects footage in a sequel
Along the Moonbeam Trail (1920) and the documentary
Evolution (1923), but O'Brien received little financial reimbursement from this success. The film however did help to secure his position on
Harry O. Hoyt's
The Lost World. For his early, short films O'Brien created his own characters out of clay, although for much of his feature career he would employ Richard and
Marcel Delgado to create much more detailed stop-motion models (based on O'Brien's designs) with rubber skin built up over complex, articulated metal armatures. The models contained a bladder inside the skeleton model that could be inflated and deflated to give the illusion of breathing.
Sir Arthur Conan Doyle, who appeared in the prologue to the film based on his
novel of the same name, reportedly showed a reel of O'Brien's animation from the film to his friends, claiming it was real footage of living dinosaurs, to try to convince them that his story was based on fact. O'Brien married Hazel Ruth Collette in 1925; they had two sons together, William and Willis Jr., but the marriage was an unhappy one. O'Brien was reportedly forced into it, and rebelled with drinking, gambling, and extra-marital affairs. The couple had divorced by 1930 and the two boys remained with their mother, who had begun to show unbalanced behaviour. By 1931, Hazel had been diagnosed with cancer and
tuberculosis, while William also contracted tuberculosis, which resulted in blindness in one eye and then the other. Throughout this time O'Brien worked with Hoyt on a series of canceled projects included
Atlantis for First National studio,
Frankenstein, and
Creation for
RKO Pictures, which was finally canceled in 1931 with only 20 minutes of effects footage to show for an estimated $120,000 development cost. The studio's head of production,
Merian C. Cooper, had recommended the cancellation of O'Brien's project as he thought the story was boring but he was impressed by the effects work and saw how it could be used to facilitate the development of his own pet project about a giant gorilla battling
Komodo dragons. O'Brien and the dinosaur models he had created for the canceled project were put to work on what was to become his best remembered film, the iconic
King Kong (1933). The
Academy of Motion Picture Arts and Sciences (AMPAS) proposed giving O'Brien an Oscar for his technical effects on
King Kong but Willis insisted that each of his crew also receive an Oscar statue, which the AMPAS refused to do, so O'Brien refused to accept the Oscar award for himself. This act of refusing his Oscar hurt O'Brien's reputation as a player in the Hollywood establishment, forever making him a semi-outsider in the industry, and thus whose own film proposals were seldom taken seriously. One of O'Brien's crew was
Linwood G. Dunn, who did all of the optical composites for
King Kong and
Son of Kong (also 1933), and who was a future Treasurer and President of the AMPAS and who revealed this story in private conversations with various visual effects associates years later, long after O'Brien's death.
stop motion armature from King Kong'' The success of
King Kong led to the studio commissioning the hurried sequel, which O'Brien described as cheesy. With a limited budget and a short production schedule, O'Brien chose to leave the animation work to his animation assistant, Buzz Gibson, and asked the studio not to credit him on the project. While making one of his daily visits to the set, O'Brien, who had remained close to his two sons after his separation from his estranged wife, invited Willis Jr. and the now completely blind William with him to handle the Kong and dinosaur models. A few weeks after this visit O'Brien's ex-wife, Hazel Ruth Collette, shot and killed William and Willis Jr. before turning the gun on herself. She survived the suicide attempt, and by draining her tubercular lung actually extended her life by another year. A publicity photo of O'Brien taken around this time shows the anguish on his face. Hazel Ruth Collette remained in the Los Angeles General Hospital prison ward until her death in 1934. On November 17 that same year O'Brien married his second wife, Darlyne Prenett, with whom he remained until his death. O'Brien continued to work with
Merian C. Cooper at RKO on a number of projects including the epic
The Last Days of Pompeii (1935) and
Dancing Pirate (1936), which was O'Brien's first
Technicolor production. The two also developed
War Eagles about a race of Vikings riding on prehistoric eagles fighting with dinosaurs, but the project was cancelled when Cooper re-enlisted as a colonel in the U.S. Army Air Forces at the outset of World War II. O'Brien went on to do some special effects work, re-using one of the mattes from
Son of Kong, on
Orson Welles'
Citizen Kane (1941) and
George Pal's Oscar-nominated animated short
Tulips Shall Grow (1942), as well as developing his own project,
Gwangi, about cowboys who encounter a prehistoric animal in a "lost" valley, which he failed to sell to the studio.
Mighty Joe Young (1949), on which O'Brien is credited as Technical Creator, won an
Academy Award for Best Visual Effects in 1950. Credit for the award went to the film's producers,
RKO Productions, but O'Brien was also awarded a statue, this time proudly accepted by him. O'Brien was assisted by his protege (and successor)
Ray Harryhausen and
Pete Peterson on this film and, by some accounts, left the majority of the animation to them. O'Brien and his wife developed
Emilio and Guloso (aka,
Valley of the Mist), about a Mexican boy and his pet bull who save their town from a dinosaur called "Lagarto Grande", which was optioned by producer
Jesse L. Lasky Sr., with O'Brien and Harryhausen on board to do special effects, before falling through. O'Brien subsequently worked for Cooper at the new Cinerama corporation with plans to do a remake of
King Kong using the new wide-screen techniques but ended up contributing a matte for the travelogue
This Is Cinerama (1952) when this project also fell through. O'Brien worked with Harryhausen one last time on the dinosaur sequence for
Irwin Allen's nature documentary
The Animal World (1956). O'Brien's story ideas for
Gwangi and
Valley of the Mist were developed into
Edward Nassour and Ismael Rodríguez's
The Beast of Hollow Mountain (also 1956) but he did not work on the film's effects, which were the first to combine stop-motion and live-action in a color film. O'Brien also worked with Peterson again on
The Black Scorpion (1957) and
Behemoth, the Sea Monster (aka "The Giant Behemoth") (1959), but the two animators subsequently struggled to find other work. Allen hired O'Brien as the effects technician on his remake of
The Lost World (1960), but he was given little to do as the producer opted for live lizards instead of stop-motion animation for the dinosaurs. One of his story ideas
King Kong vs. Frankenstein was developed into
Ishirō Honda's
King Kong vs. Godzilla (1962) but O'Brien was once again not involved in the production. Shortly before his death, he animated a brief scene for Linwood G. Dunn's "Film Effects of Hollywood" company in ''
It's a Mad, Mad, Mad, Mad World'' (1963), featuring the male leads and secondary characters dangling from a fire escape and ladder, but he died before the film was released. O'Brien died in Los Angeles on November 8, 1962. He was survived by his second wife, Darlyne. In 1997, he was posthumously awarded the
Winsor McCay Award by
ASIFA-Hollywood, the United States chapter of the International Animated Film Society
ASIFA (Association internationale du film d'animation). The award is in recognition of lifetime or career contributions to the art of animation. His interment was located at
Chapel of the Pines Crematory. The film
The Valley of Gwangi (1969), completed for Warner Bros. by Harryhausen seven years after O'Brien's death, was based on an idea the latter had spent years trying to bring to the screen. O'Brien wrote the script for an earlier version of the story, which was released as
The Beast of Hollow Mountain (US 1956), but O'Brien did not handle the effects for that movie. O'Brien's work was celebrated in March 1983 with the appearance of his wife, Darlene, at a 50th-anniversary event commemorating the day of the first screening of the film at Graumann's (later Mann's)
Chinese Theater on
Hollywood Boulevard, complete with a screening of a new print of
King Kong and a new recreation of the full-scale bust of Kong that appeared 50 years apart at both events in the outdoor lobby of the theater. Three articles in the August 1983 issue of
American Cinematographer magazine detailed the 1983 anniversary event. In March 1984, O'Brien's work was the subject of a special exhibit at the
Kaiser Center in Oakland, California. This exhibit included many sketches, artifacts, and photographs from O'Brien's personal collection, some of which had never been seen in public. In 2005,
Peter Jackson produced and directed
King Kong. It was filmed in New Zealand and featured visual effects by
Weta Digital. It was dedicated to O'Brien and the other key contributors to the original film. ==Filmography==