In 1954 Delia made her theatre debut with "Giove in doppiopetto" (Double-breasted Jupiter). The show is considered the first "Commedia musicale", an italian musical genre created by playwrights Pietro Garinei and Sandro Giovannini with the collaboration of the musician and songwriter Gorni Kramer. Scala later starred in "Buonanotte Bettina" (Goodnight Bettina"," 1956) with Walter Chiari, "L'adorabile Giulio" (The Adorable Giulio, 1957) with Carlo Dapporto, "Un trapezio per Lisistrata" (A Trapeze for Lisistrata, 1958) with Nino Manfredi and Paolo Panelli, "Delia Scala Show" (1960), "Rinaldo in campo" (Rinaldo into the Field, 1961) with Domenico Modugno, "My Fair Lady" (1964) with Gianrico Tedeschi and Mario Carotenuto, and "Il giorno della tartaruga" (The Day of the Turtle, 1965) with Renato Rascel.