Please Don’t Eat The Daises (1960)
The cast includes Janis Paige as Deborah Vaughn, a theater actress who would like to seduce the new critic; Richard Hayden as Alfred, Deborah’s manager and friend to the MacKays; Jack Weston as Joe, a cabdriver-turned-playwright who seeks Larry’s advice; Spring Byington as Kay’s mother; and Carmen Phillips in a brief comic scene as a bizarre new tenant in the apartment who does not like being awake in the daytime.
Lennart's dialogue between Day and Niven is the heartbeat of this domestic tale. Lennart's co-worker at MGM, Dorothy Kingsley, said of her, "Isobel lived for her work. She would get up in the middle of the night and write down a line. If someone didn't like her script, she'd throw up." The screenwriter was nominated for a Writers Guild Award for Best Written American Comedy for this film.
Though this is not a musical, with the award-winning songstress as the star, the film manages to squeeze in reasons for Day’s character to sing. With three fun songs, including the title tune by Joe Lubin, which Day sings in a playground with children, the best is a brief reprise of a ballad from another film with which the star would forever become synonymous – "Que Sera, Sera."