Abstract: The present invention refers to a cosmetic composition, preferably an oil-in-water emulsion (o/w) or aqueous gel, for the treatment of oily, mixed, or acned skin, comprising:—at least an anti-ageing sign active preferably corresponding to about 0.05% to about 10% of the total mass selected from the group consisting solubilized hydrophilic actives and lipophilic actives;—at least a sun protection system selected from the group consisting of hydrophilic sun-screens promoting photostable UVB and UVA protection, which preferably promotes a protection corresponding to a SPF of up to 30;—at least a oleosity control agent preferably comprising Zinc PCA; and—cosmetically acceptable alcohol-free adjuvants or carriers. The present invention is further directed to a skin treatmento kit preferably comprising a cosmetic composition as defined above for diurnal use and a complementary cosmetic composition, preferably a serum, for nighttime use.