[2] After some time in a chorus line at the Roxy Theater, she joined Art Mooney's big band and worked with Billy Eckstine, who gave her the name "Fran Warren".

[3][4] She spent almost two years with the Charlie Barnet band before achieving some recognition with Claude Thornhill.

[3] In 1947, she reached the music charts for the first time with the song "A Sunday Kind of Love" written by her manager, Barbara Belle.

[3] She had a hit record with "I Said My Pajamas (and Put On My Pray'rs)", a duet with Tony Martin which reached No.

Warren performed in the musicals Mame, South Pacific, and The Pajama Game and went on tour with the big band of Harry James.