A new and distinct Malus domestica Borkh apple tree variety named ‘MILLY’, particularly characterized by its weak vigor and early and constant production. Fructification is precocious, and the productivity is high. The fruits have medium to big size, are slightly asymmetric , with an attractive red-purple color on 50-60% of the surface. The flesh is crispy, juicy and firm and has a mild flavor. The taste is very good and the aroma is mild, slightly acid to sweet, with a good sugar content with balanced acidity level. Good tendency to long term storage.