Troubadour, a French-accented turtle, inadvertently injures a storyteller just before a live broadcast. Troubadour is hastily made to take the storyteller's place, takes out his comic book, and tells the audience his favored version of The Three Musketeers.

In 17th-century France, street urchins Mickey Mouse, Donald Duck, Goofy, and Pluto are one day harassed by the Beagle Boys but are saved by royal musketeers. Mickey is gifted one of their hats, inspiring him and his friends to follow their example and become musketeers themselves. Years later, the trio are employed as janitors at the musketeers' headquarters, headed by Captain Pete. Pete mocks the trio's desire to become musketeers, deeming them all too unfit for the job in addition to that, the three of them do not do any of the janitorial jobs correctly without messing it up and always end up destroying parts of the headquarters. They are ordered to work in the laundry dungeon as punishment for an earlier incident.

Meanwhile, Princess Minnie narrowly avoids a large safe being dropped on her by the Beagle Boys. Captain Pete, revealed to be their boss, chastises them for attempting to assassinate her, as he wants her kidnapped so that he can take over the kingdom on the night of the Opera, but doesn't want to kill her. In response to the attempt on her life, Minnie summons Pete, demanding he produce musketeer bodyguards to protect her. Pete realizes that with experienced musketeers, his plan will thwart, but after witnessing yet another disaster, he decides to falsely recruit the incompetent Mickey, Donald, and Goofy as musketeers since he believes that they will be easy to get rid of, elating the trio. Minnie falls in love with Mickey at first sight.

While on a carriage ride, the Beagle Boys ambush Mickey, Donald and Goofy, easily defeat them, and kidnap Minnie and her lady-in-waiting, Daisy. Mickey encourages his friends to not lose hope and they all hurry to rescue Minnie and Daisy from an abandoned tower. Goofy rushes in first, running up all the stairs and out a window into a series of events that catapults him back into the tower. The musketeers then engage the Beagle Boys in another fight. Donald hides, leaving Mickey and Goofy cornered, but Goofy manages to come up with an idea to jump out the window with Mickey to engage the same events as before in order to force the bandits out of the tower and into the river. Minnie and Daisy are rescued, and Minnie and Mickey spend time together and fall deeper in love.

Pete realizes that the trio is more of a threat than he originally anticipated, so he plans to get rid of them individually. While on night patrol, Goofy is lured away from the palace by Pete's lieutenant, Clarabelle, using a shadow puppet of Mickey. Donald is chased by the Beagle Boys and delivered to Pete, who reveals his true nature after trapping him in a guillotine, though Donald manages to escape, causing Pete to lose his peg leg after he tries to stop him. Donald returns to the palace to inform Mickey what happened. While Mickey chooses to remain and stop Pete, Donald is too frightened and abandons him. Pete then ambushes Mickey, locks him in a dungeon at Mont Saint-Michel and leaves him to die when the tide comes in to flood the cell.

Meanwhile, Clarabelle is about to kill Goofy by throwing him into the Seine. However, the two instantly become smitten with one another and Clarabelle has a change of heart. Clarabelle informs Goofy that Mickey is in danger. Pluto leads Goofy to Mickey's location, with Donald being dragged along. When Donald is still too scared to help save Mickey, Troubadour musically berates Donald for his cowardice, angering him into going with Goofy. The duo narrowly saves Mickey. When Mickey despairs that their status as musketeers was a lie, Goofy encourages him by stating that despite their flaws, there is nothing they can't accomplish while together. Rejuvenated, Mickey leads his friends to stop Pete and save the princess.

At the theater, Pete and the Beagle Boys then capture Minnie and Daisy, imprisoning them in a chest. One of the Beagle Boys impersonates Minnie and announces Pete as the new king of France to the public. Mickey, Donald and Goofy arrive and battle Pete and the Beagle Boys onstage. Mickey, Donald and Goofy come together and defeated Pete, allowing them to rescue Minnie and Daisy, who profess their love for Mickey and Donald, respectively. Minnie later officially dubs Mickey, Donald and Goofy as royal musketeers, fulfilling their dream.

• Wayne Allwine as Mickey Mouse^[3]
• Tony Anselmo as Donald Duck^[3]
• Bill Farmer as Goofy and Pluto
• Russi Taylor as Minnie Mouse^[3]
• Tress MacNeille as Daisy Duck^[3]
• Jim Cummings as Pete^[3]
• April Winchell as Clarabelle Cow^[3]
• Jeff Bennett and Maurice LaMarche as The Beagle Boys
• Rob Paulsen as The Troubadour
• Jess Harnell as Major General
• Frank Welker as Additional Voices

An adaptation of Alexandre Dumas's The Three Musketeers, with Mickey Mouse, Donald Duck, and Goofy as the Musketeers, was planned during the 1980s at Walt Disney Animation Studios. In 1983, storyboard artists Steve Hulett and Pete Young developed the project with Mickey Mouse, Donald Duck, Goofy, and José Carioca as the Musketeers, but it fell into development hell.^[4] In 2002, in honor of Mickey Mouse's 75th anniversary, a featurette entitled The Search of Mickey Mouse was announced. The project was about Mickey who gets kidnapped by unknown forces, forcing Minnie Mouse to enlist Basil of Baker Street to investigate his disappearance, and later encounters one character from Disney's animated film canon such as Alice, Peter Pan, Robin Hood, and Aladdin.^[5] The project suffered script problems with the multiple cameos being thought to be too gimmicky.^[6] After the cancellation of the latter project, a feature film based on The Three Musketeers with Mickey, Donald, and Goofy in the lead roles was greenlit instead, but the film did not include José Carioca as in the early development.

As of October 2020^[update], Mickey, Donald, Goofy: The Three Musketeers had a rating of 36% on review aggregator Rotten Tomatoes based on 11 reviews with an average score of 4.84/10.^[7]

The film had a limited theatrical screening in El Capitan Theater.^[8] The film was first released on DVD and VHS on August 17, 2004.^[2][9] The DVD was the first to include Disney's FastPlay, which imitates VHS operation by starting play automatically rather than waiting at the main menu for user input.^[10] For the film's 10th anniversary, it was released on Blu-ray on August 12, 2014.^[3]

A world named Country of the Musketeers based on the film appears in Kingdom Hearts 3D: Dream Drop Distance.^[11][12] This is the first time a world in the Kingdom Hearts series has originated from a direct-to-video feature.^[13] Like the Timeless River world in Kingdom Hearts II, it is featured as a period of Mickey Mouse's past. All the characters except Daisy, Clarabelle, and the Troubadour appear.

The soundtrack for the film, titled Mickey, Donald & Goofy: The Three Musketeers, was released on August 13, 2004, by Walt Disney Records.^[9] In addition to seven classical pieces reinterpreted with new comedic lyrics,^[14] it also features a rewritten cover of the Schoolhouse Rock classic "Three Is a Magic Number" by Stevie Brock, Greg Raposo and Matt Ballinger.^[9] In 2018, Mickey, Donald and Goofy: The Three Musketeers became the first direct-to-video Disney film to have its full musical score, released on CD by Intrada Records. Like the original album, Intrada's release includes all the songs from the film, though in this release, most of them are put together with the respective pieces of Bruce Broughton's background music that leads up to them. Some of the music cues include pieces of the score that ultimately went unused in the film. The "Three is a Magic Number" cover is also omitted this time.

• Official website
• Mickey, Donald, Goofy: The Three Musketeers at IMDb