<Ul> <Li> Gene Kelly as Don Lockwood . His performance in the song `` Singin ' in the Rain '' is now considered to be iconic . </Li> <Li> Debbie Reynolds as Kathy Selden . Directors Gene Kelly and Stanley Donen insisted that Reynolds was always first in their minds for the role . Although the film revolves around the idea that Kathy has to dub over for Lina 's voice , in the scene where Kathy is dubbing a line of Lina 's dialogue ( `` Our love will last ' til the stars turn cold '' ) , Jean Hagen 's normal voice is used . </Li> <Li> Donald O'Connor as Cosmo Brown , Don 's lifelong pal , and vaudeville partner , who becomes the head of Monumental Pictures ' music department . </Li> <Li> Jean Hagen as Lina Lamont . Fresh off her role in The Asphalt Jungle , Hagen read for the part for producer Arthur Freed . She did a dead - on impression of Judy Holliday 's Billie Dawn character from Born Yesterday , which won her the role . </Li> <Li> Millard Mitchell as R.F. Simpson . The initials of the fictional head of Monumental Pictures are a reference to producer Arthur Freed . R.F. also uses one of Freed 's favorite expressions when he says that he `` can not quite visualize it '' and has to see it on film first , referring to the `` Broadway Melody '' sequence . This is a joke , since the audience has just seen it . </Li> <Li> Cyd Charisse as the long - legged woman in the green sequined dress and Louise Brooks hair who vamps Gene Kelly in the `` Broadway Melody '' sequence . </Li> <Li> Douglas Fowley as Roscoe Dexter , the director of Don and Lina 's films . </Li> <Li> Rita Moreno as Zelda Zanders , the `` Zip Girl '' and Lina 's friend . </Li> </Ul>
who are the actors in singing in the rain
Gene Kelly Debbie Reynolds Donald O'Connor Jean Hagen Millard Mitchell Cyd Charisse Douglas Fowley Rita Moreno