Question: who sang the one day at a time theme song
Answer: a Time Genre Sitcom Created by Whitney Blake Allan Manings Developed by Norman Lear Directed by Norman Campbell Herbert Kenwith Sandy Kenyon Howard Morris Noam Pitlik Alan Rafkin Don Richardson Tony Singletary Starring Bonnie Franklin Mackenzie Phillips Richard Masur Valerie Bertinelli Pat Harrington Mary Louise Wilson Michael Lembeck Ron Rifkin Glenn Scarpelli Boyd Gaines Shelley Fabares Nanette Fabray Howard Hesseman Theme music composer Jeff Barry Nancy Barry Opening theme `` This is It '' performed by Polly Cutter Ending theme `` This is It '' ( instrumental ) Composer ( s ) Jeff Barry Country of origin United States Original language ( s ) English No.