Metro-Goldwyn-Mayer cartoon studio

In March 1937, MGM hired film sales executive Fred Quimby, a man with no experience in the animation industry,[13] to set up and run the new MGM cartoon department. Among the holdovers from the Harman-Ising regime, William Hanna and Bob Allen were appointed as directors, and Carmen Maxwell became production manager. Quimby raided every major American animation studio for talent, extracting artists, directors, and writers from studios, such as Friz Freleng from Leon Schlesinger Productions, Emery Hawkins from Screen Gems, and much of the top staff at Terrytoons (Joseph Barbera, Jack Zander, Ray Kelly, Dan Gordon, George Gordon, and others).[13] After spending some time headquartered in a nearby house, the new MGM cartoon studio at Overland Ave. and Montana Ave. opened its doors on August 23, 1937.[14]

Although it boasted a brand-new facility and good directors, the MGM cartoon studio's first series was a failure. The Captain and the Kids, adapted from Rudolph Dirks' Katzenjammer Kids characters, was licensed by MGM without input from its then-forming creative staff.[15] Freleng, Hanna, and Allen, assigned to direct the Captain and the Kids cartoons, were unable to translate the Katzenjammer humor into animation, and the series folded after fifteen episodes. Only two of the Captain and the Kids shorts were produced in Technicolor; the other thirteen were produced in black-and-white and released in sepia-toned prints.

MGM brought in established newspaper cartoonists such as Milt Gross and Harry Hershfield in an attempt to both bolster the Captain and the Kids product and create original properties for MGM, but both cartoonists' tenures at the studio were short-lived. Gross managed to complete two cartoons, Jitterbug Follies and Wanted: No Master, with his characters Count Screwloose of Tooloose and J.R. the Wonder Dog, while Hershfield completed no cartoons.

In October 1938, Quimby, coming full-circle, hired Hugh Harman and Rudolf Ising as the new creative heads of the studio, acting as both directors and producers, and in charge of many of the employees who had defected from the Harman-Ising studio a year before.[16]

Among Ising's first new cartoons for MGM was 1939's The Bear Who Couldn't Sleep, the debut appearance of Barney Bear, a lumbering anthropomorphic bear based upon both Wallace Beery and Ising himself. Barney Bear would become MGM's first original cartoon star, regularly featured in cartoons until 1953, although his popularity never rose to the level of Mickey Mouse or Porky Pig. Ising focused on the Barney Bear cartoons, while Harman focused on making intricately animated one-shot cartoons, although Harman was able to establish a short-lived series of Three Bears cartoons.

At this time, Harman created his masterwork, Peace on Earth. Released during the holiday season of 1939 (immediately after the outbreak of World War II in Europe), Peace on Earth was a serious work which dealt with the idea of what a post-apocalyptic world would be like. Peace on Earth was nominated for the 1939 Academy Award for Short Subjects (Cartoons), as well as for the Nobel Peace Prize.

Friz Freleng, briefly assigned to work under Harman, returned to Schlesinger after his MGM contract expired in April 1939,[17] and storyman Joseph Barbera was united with director William Hanna to co-direct cartoons for Rudolf Ising's unit. The partnership between Hanna and Barbera would last for more than six decades, until Hanna's death in 2001. The duo's first cartoon together was 1940's Puss Gets the Boot, featuring an unnamed mouse's attempts to outwit a housecat named Jasper. Though released without fanfare, the short was financially and critically successful, earning an Academy Award nomination for Best Short Subject (Cartoons) of 1940. On the strength of the Oscar nomination and public demand, Hanna and Barbera were assigned to direct more cat-and-mouse cartoons, soon christening the characters Tom and Jerry. Puss Gets the Boot did not win the 1940 Academy Award for Best Cartoon, but another MGM cartoon, Rudolf Ising's The Milky Way did, making MGM the first studio to wrestle the Cartoon Academy Award away from Walt Disney.[4]

Tom & Jerry quickly became MGM's most valuable animated property. The shorts were successful at the box office, many licensed products (comic books, toys, etc.) were released to the market, and the series would earn twelve more Academy Award for Short Subjects (Cartoons) nominations, with seven of the Tom & Jerry shorts going on to win the Academy Award: The Yankee Doodle Mouse (1943), Mouse Trouble (1944), Quiet Please! (1945), The Cat Concerto (1946), The Little Orphan (1948), The Two Mouseketeers (1951), and Johann Mouse (1952). Tom & Jerry was eventually tied with Disney's Silly Symphonies as the most-awarded theatrical cartoon series. Originally barred by Quimby from making a second cat-and-mouse short until the overwhelming success of Puss Gets the Boot demanded it, Hanna and Barbera and their team of animators, who included George Gordon, Jack Zander, Kenneth Muse, Irven Spence, Ed Barge, Ray Patterson and Pete Burness, worked on nothing but Tom & Jerry cartoons from 1941 until 1955. Exceptions were half a dozen one-shot theatrical shorts, including Gallopin' Gals (1940), Officer Pooch (1941), War Dogs (1943), We Wish You a Merry Christmas (1941), Good Will to Men (1955), and the last seven Tex Avery shorts featuring Droopy.

Key to the successes of Tom and Jerry and other MGM cartoons was the work of Scott Bradley, who scored virtually all of the cartoons for the studio from 1934 to 1957. Bradley's scores made use of both classical and jazz sensibilities. In addition, he often used songs from the scores of MGM's feature films, the most frequent of them being "The Trolley Song" from Meet Me in St. Louis and "Sing Before Breakfast" from Broadway Melody of 1936.[18]

Hugh Harman left the MGM studio in April 1943, and Rudolph Ising departed eighteen months later.[19] George Gordon took over Ising's department, continuing work on the Barney Bear cartoons, but only completed three cartoons before he left the studio in 1943. In Harman's place, Quimby hired Tex Avery, an animation director known for his wild comedic style at the Schlesinger studio. Avery's first short for MGM was the World War II parody Blitz Wolf, which was nominated for the 1942 Academy Award for Short Subjects (Cartoons). While Avery had revolutionized cartoon humor at Schlesinger's, he went several steps further in his MGM works. Avery exaggerated his characters and situations wildly, and was noted for the precise and hard-edged timing of his gags.[20] Among Avery's most noted cartoons for MGM were slapstick comedies such as Red Hot Riding Hood (1943), Jerky Turkey (1945), Northwest Hounded Police (1946), King-Size Canary (1947), Little Rural Riding Hood (1949), and Bad Luck Blackie (1949).[21] While Avery preferred to focus on gags instead of characterization, he established several popular MGM cartoon characters, including Screwball "Screwy" Squirrel, the Of Mice and Men derived pair of George and Junior, and his best-known character, Droopy.[22] Droopy, voiced by Bill Thompson (a.k.a. "Wallace Wimple" on NBC Radio's Fibber McGee and Molly show) debuted in 1943 with Dumb-Hounded. He appeared in several more Avery cartoons (including Northwest Hounded Police) before being officially given his own series in 1948 with Senor Droopy.

The influence of Avery's cartoons was felt across the animation industry; even Hanna and Barbera adapted their Tom and Jerry shorts to match the levels of madcap humor and violence in Avery's films.[23] Avery's team included storymen Rich Hogan and Heck Allen, and animators such as Michael Lah, Ed Love, and Preston Blair, most famous for animating the sexy female singer in Red Hot Riding Hood and its follow-ups. In 1946, Quimby assigned Blair and Lah to direct a new series of Barney Bear cartoons, reversing the decision after three cartoons.[24][25]

Tex Avery was a perfectionist: he worked extensively on his films' stories and gags, revised his animators' drawings, and was even known to cut frames out of the final Technicolor answer print if he felt a gag had been animated too softly.[26] The strain of overwork caused Avery to quit MGM in May 1950, after completing Rock-a-Bye Bear (not released until 1952 because of MGM's cartoon backlog). Former Walter Lantz director Dick Lundy was brought in to head Avery's unit. Lundy completed one Droopy cartoon and ten Barney Bear shorts before Avery returned in October 1951 and reassumed his role as director from Lundy, starting with Little Johnny Jet (released in 1953).

Avery directed eleven more cartoons for MGM, many of them showing the heavy influence of the style of the newly popular UPA studio in their designs. In March 1953, MGM closed down the cartoon unit, thinking that the growing trend for 3-D films would bring an end to the animated cartoon.[27] Avery himself did not leave the studio until June, working with co-director Michael Lah on two cartoons, Deputy Droopy and Cellbound, which Lah completed with the Hanna and Barbera staff (working during the most part of 1953 for commercials, as a predecessor of H-B Enterprises) during the closure. Avery went on to join the Walter Lantz staff the following February, while Lah went on to do commercial animation work.[27] Because of the backlog of completed MGM cartoons, the cartoons Avery completed during his second tenure at the studio were not released until after he'd left again; Cellbound was not released until 1955.

Meanwhile, after the studio reopened in 1954, budget cuts required Hanna and Barbera to reduce the level of detail in their Tom and Jerry shorts (a precursor of what was to come), and to also begin doing one "cheater" short per year composed mostly of footage from previously released cartoons.[28] That year, Hanna and Barbera directed Pet Peeve, the first MGM cartoon in the new widescreen CinemaScope process, which had been was devised as a means to keep audiences attending movie theatres in the wake of the popularity of television. Pet Peeve, released in late 1954, was followed by a sporadic number of CinemaScope Tom and Jerrys, with several other Tom and Jerrys being dual-released in standard format and in CinemaScope. After Pecos Pest (released in 1955), all MGM cartoons were released in CinemaScope. Six previous MGM cartoons, among them Hugh Harman's Peace on Earth, were remade in CinemaScope. Like the original Peace on Earth in 1939, its 1955 remake, Good Will to Men, was nominated for the Academy Award for Best Short Subject (Cartoons).

Quimby retired in 1955, and Hanna and Barbera became the new heads of the studio. Michael Lah returned to the studio in 1955 to direct an animated sequence for the MGM feature Invitation to the Dance, and stayed on to supervise a new series of CinemaScope Droopy cartoons to accompany the new CinemaScope Tom and Jerry cartoons.

Lah's One Droopy Knight was nominated for the 1957 Academy Award for Best Short Subject (Cartoons). However, for the most part, both the 1955–1957 CinemaScope Droopy and Tom and Jerry cartoons had lost their appeal in the eyes of critics, due to weaker stories and simplistic animation, brought on as the result of cuts to their budget.[29] To keep the studio alive, MGM had begun reissuing previously released cartoons since the 1940s, but in late 1956 decided that, since the reissued shorts brought in as much revenue as the new shorts,[30] it could save six hundred thousand dollars a year by ending new production. Most of the reissued cartoons were Tom and Jerry, Droopy, and shorts featuring Tex Avery's showgirl, Red. None of Tex Avery's Screwy Squirrel and George and Junior cartoons were reissued.[5][31]

The studio was shut down on August 1, 1958, and Hanna and Barbera took most of their unit and began producing television cartoons with their company Hanna-Barbera Productions. Hanna-Barbera first approached MGM to distribute their cartoons for television, but were turned down.[6] Columbia Pictures' Screen Gems picked up Hanna-Barbera's product, and the studio soon became the most successful producers of television animation in the world. MGM would later have Gene Deitch create a series of Tom and Jerry cartoons before contracting Chuck Jones and Les Goldman's Sib Tower 12 studio to create more Tom and Jerry shorts. Sib Tower 12 was absorbed by MGM in 1964, and was renamed MGM Animation/Visual Arts.

Many MGM cartoons have become fan favorites throughout the years due to their animation style, plot, humor, cartoon violence (specifically the Tom and Jerry shorts), music, and at times, sexual innuendos (with regards to shorts starring Red). Individual shorts such as To Spring (1936) and The Dot and the Line (1965) have been acclaimed for their artistic designs while others such as Screwball Squirrel (1944) and King-Size Canary (1947) are celebrated for their sheer lunacy. Though not as popular with the general public as the Disney or Warner Bros. cartoons, MGM cartoons are heavily studied and praised by film historians and members of the animation industry.

As of 2009, nearly all of the Hanna and Barbera-produced Tom and Jerry shorts are available on DVD under the Tom and Jerry Spotlight Collection, a series of three DVD box sets that were released from October 2004 to September 2007 (however, two cartoons are missing due to politically incorrect scenes, and several of the released ones are edited). Warner Home Video would later release the Tom & Jerry shorts as part of the Tom and Jerry Golden Collection series of DVD and Blu-ray boxsets, which started with the first volume being released October 25, 2011, with the shorts being presented uncut, restored, remastered, in chronological order, and for the Blu-ray version, in 1080p high definition. Moreover, a two-disc collection of all of Droopy's cartoons was released in May 2007. Rumors have floated around for years of a box set consisting of Tex Avery's MGM work, but nothing has been released besides the Spotlight and Golden box sets for Tom and Jerry and the Droopy collection in the United States, although all of Tex Avery's cartoons were released on DVD in France through Warner Home Video. However, in 2020, Tex Avery cartoons finally started being released on Blu-ray, when Warner Archive Collection made Tex Avery Screwball Classics Volume 1 this February with 19 of the cartoons. A second volume was announced in March, and was released on December 15, 2020.

• Hugh Harman (1937–1943)
• Rudolph Ising (1937–1943)
• Tex Avery (1942–1956)
• Fred Quimby (1937–1955)
• William Hanna and Joseph Barbera (1940–1958)

• Heck Allen
• Homer Brightman

• Ed Benedict
• Harvey Eisenberg
• Bob Kuwahara

• Scott Bradley (1937–1958)
• Edward Plumb (1953)