Born in Ploaghe, Sardinia, the son of Roberto Arru and Daniela Usai, Andrea Arru (born 18 August 2007) is an Italian actor and model. He is best known for playing Pietro Maggi in the teen drama series Di4ries and young Diabolik in the 2023 crime action film Diabolik: Who Are You? As a child, he modeled for Ferrè and Armani,which led to him being recruited to act in a short film by the Scuola Civica di Cinema di Sassari, marking his entry into the acting world.