She was active in cinema and television during the 1950s and 1960s, and was notably the third wife of Roger Moore.

[1][2] Mattioli worked as a cashier at Doney's, a cafe on the Via Veneto in Rome, Italy prior to becoming an actress.

After enrolling in film school, she traveled to England, where she found work in the television and movie industries.

[3] Mattioli and Roger Moore met in 1961 while filming Romulus and the Sabines.

Moore and Mattioli ultimately lived together for eight years, and became the parents of two children before Squires relented.