Benedetta's mother works as a secretary at the Quirinal Palace and her father was a lawyer and now works as an archaeologist, they separated when she was nine years old. She also has a younger brother, Guglielmo. She has taken modeling classes since she was a child and began modeling at age 14 for the Subdued brand, then posed for Timberland, Fendi and Gucci. She never acted in plays in high school because she liked singing, however, she got into acting when her agent, Fiamma Consorti, a friend of her mother's, wanted to open a young talent agency, so she asked her if she felt like doing some auditions. She was initially reluctant but said she might give it a try. She then auditioned for the Rai 1 series Tutto può succedere (2015) and, a month later, when she had completely forgotten she had done it, she got the call that she got a role and was given a four-year contract. After she got the role, she said that, "school was the first problem," because she attended Terenzio Mamiani, a public school, she immediately had to switch and go to a private school to coordinate her shooting hours. She earned her diploma at the Visconti Institute in 2018. She then enrolled in college. Porcaroli is also an avid singer, and has been singing since she was a child. She sang for eight years, entered a conservatory for four years, two years as a soloist and two years is a group, but dropped out, and has stated that she regrets it. She played sports such as volleyball, swimming, tennis, skiing and artistic gymnastics.