Explanation:
Plot
Don Lockwood (Gene Kelly) is a popular silent film star with humble roots as a hoofer and stuntman. Don barely tolerates his vain, cunning, conniving, and shallow leading lady, Lina Lamont (Jean Hagen), though their studio, Monumental Pictures, links them romantically to increase their popularity. Lina is convinced that they are in love, despite Don's protestations otherwise.
At the premiere of his latest film, The Royal Rascal, Don tells the gathered crowd a sarcastic, hyperbolic version of his life story, including his motto: "Dignity, always dignity." His words are humorously contradicted by flashbacks showing him alongside his best friend Cosmo Brown (Donald O'Connor). ("Fit as a Fiddle") To escape from his fans after the premiere, Don jumps into a passing car driven by Kathy Selden (Debbie Reynolds). She drops him off, but not before claiming to be a stage actress and sneering at his "undignified" accomplishments as a movie star.
Later, at an after party, the head of Don's studio, R.F. Simpson (Millard Mitchell), shows a short demonstration of a talking picture,[a] but his guests are unimpressed. To Don's amusement, Kathy pops out of a mock cake right in front of him, revealing herself to be a chorus girl. ("All I Do is Dream of You") Furious at Don's teasing, she throws a real cake at him, only to accidentally hit Lina in the face and flee. Don becomes smitten with Kathy and searches for her for weeks, with Cosmo trying to cheer him up. ("Make 'Em Laugh") While filming a romantic scene, a jealous Lina reveals that her influence is behind Kathy's loss of work and subsequent disappearance. On the studio lot, Cosmo finally finds Kathy quietly working in another Monumental Pictures production ("Beautiful Girl") and gets Don. Don sings her a love song, and she confesses to having been a fan of his all along. ("You Were Meant for Me")
After rival studio Warner Bros. has an enormous hit with its first talking picture, the 1927 film The Jazz Singer, R.F. decides he has no choice but to convert the next Lockwood and Lamont film, The Dueling Cavalier, into a talkie. The production is beset with difficulties, including Lina's grating voice and strong New York accent. Exasperated diction coaches try to teach her and Don how to speak properly, but to no avail. ("Moses") The Dueling Cavalier's preview screening is a disaster; the actors are barely audible thanks to the awkward placing of the microphones, Don repeats the line "I love you" to Lina over and over, to the audience's derisive laughter,[b] and in the middle of the film, the sound goes out of synchronization, with hilarious results as Lina shakes her head while the villain's deep voice says, "Yes! Yes! Yes!" and the villain nods his head while Lina's squeaky soprano says, "No! No! No!"
Afterwards, ("Good Morning") Don, Kathy, and Cosmo come up with the idea to turn The Dueling Cavalier into a musical called The Dancing Cavalier, complete with a modern musical number and backstory. The three are disheartened when they realize Lina's terrible voice remains a problem; but Cosmo, inspired by a scene in The Dueling Cavalier where Lina's voice was out of sync, suggests that they dub Lina's voice with Kathy's. ("Singin' In the Rain") After hearing Don and Cosmo pitch the idea, R.F. approves but tells them not to inform Lina that Kathy is doing the dubbing. ("Broadway Melody") When Lina barges in on a dubbing session and learns the truth, ("Would You") she is infuriated. She becomes even angrier when she discovers that R.F. intends to give Kathy a screen credit and a big publicity buildup afterward. Lina threatens to sue R.F. unless he makes sure no one ever hears of Kathy and that she keeps dubbing for the rest of her career. R.F. reluctantly agrees, as a clause in Lina's contract states that the studio is responsible for positive media coverage of her.
The premiere of The Dancing Cavalier is a tremendous success. When the audience clamors for Lina to sing live, Don, Cosmo, and R.F. tell her to lip sync into a microphone while Kathy, concealed behind the curtain, sings into a second one. While Lina is "singing", ("Singin' in the Rain Reprise") Don, Cosmo, and R.F. gleefully raise the curtain, revealing the fakery. Lina flees in humiliation, and a distressed Kathy tries to run away as well, but Don proudly announces to the audience that she's "the real star" of the film. ("You Are My Lucky Star") Later, Kathy and Don kiss in front of a billboard for their new film, Singin' in the Rain.
Hope this helped you!
