The older Italian lady is apparently an actress and model whose parents were also famous so I'm guessing she's instantly recognizable to Italians; the name doesn't ring even a faint bell with me.
From the
Gucci website: Guests including Sienna Miller, Iggy Pop, Benedetta Barzini and Gucci Mane are at a party in a villa for the Cruise 2020 campaign conceived by Alessandro Michele. Shot by Harmony Korine and art directed by Christopher Simmonds, the scenes are inclusive, uninhibited hedonism, epitomizing Gucci’s spirit. From the kitchen to the bathtub and in the swimming pool they celebrate: the ageless wild rockstar, the glamorous socialite, the bourgeois lady, the tycoon, and the hip hop star, all wearing pieces and accessories from the collection.