Although it was not a big hit when first released, it was accorded its legendary status by contemporary critics. It is now frequently described as one of the best musicals ever made,topping the AFI's 100 Years of Musicals list, and ranking fifth in its updated list of the greatest American films in 2007.
- Gene Kelly as Don Lockwood. Although his performance in the song "Singin' in the Rain" is now considered iconic, Kelly was not the first choice for the role—Howard Keel was originally cast. However, Keel was replaced by Kelly as the screenwriters evolved the character from a "Western actor" to a "song-and-dance vaudeville" performer.
- Debbie Reynolds as Kathy Selden. Early on in production, Judy Garland (shortly before her contract termination from MGM), Kathryn Grayson, Jane Powell, Leslie Caron, and June Allyson were among the names thrown around for the role of the "ingenue." Yet, Director Stanley Donen and Gene Kelly insisted that Debbie Reynolds always was first in their mind for the role. Although the film revolves around the idea that Kathy has to dub over for Lina's voice, even in the talking scenes, it was actually Jean Hagen's normal voice. Reynolds herself was dubbed in "Would You?" and "You are My Lucky Star" by an uncredited Betty Noyes. Also, when Kathy is supposedly dubbing Lina's voice in the live performance of "Singing in the Rain" at the end of the film, Jean Hagen is actually dubbing Reynolds' speaking voice.
- "Fit as a Fiddle (And Ready for Love)," from College Coach (1933) (music by Al Hoffman and Al Goodhart)
- "Temptation" (instrumental only), from Going Hollywood (1933)
- "All I Do Is Dream of You," from Sadie McKee (1934)
- "Singin' in the Rain," from Hollywood Revue Of 1929 (1929)
- "Make 'Em Laugh," considered an original song, but a near-plagiarism of Cole Porter's "Be a Clown", used in another Freed musical,The Pirate (1948). In the lead in to the song, O'Connor/Cosmo sarcastically references the tragic line "ridi pagliaccio" ("Laugh, clown") from the opera Pagliacci.
- "Beautiful Girl Montage" comprising "I Got a Feelin' You're Foolin'" from Broadway Melody of 1936 (1935), "The Wedding of the Painted Doll" from The Broadway Melody (1929) and "Should I?" from Lord Byron of Broadway (1930)
- "Beautiful Girl," from Going Hollywood (1933) or from Stage Mother (1933)
- "You Were Meant for Me," from The Broadway Melody (1929)
- "You Are My Lucky Star," from Broadway Melody of 1936 (1935)
- "Moses Supposes" (music by Roger Edens, lyrics by Comden and Green)
- "Good Morning," from Babes In Arms (1939)
- "Would You?," from San Francisco (1936)
- "Broadway Melody Ballet" composed of "The Broadway Melody" from The Broadway Melody (1929)and "Broadway Rhythm" fromBroadway Melody of 1936 (1935) (music by Nacio Herb Brown and Lennie Hayton)
so,for those who havent watch this movie..its a must now...