30-year-old Leanne Zaloumis was yesterday (August 2) given a 12-month community order at London's Isleworth Crown Court for the incident in March, which saw her break a window of Cowell's Holland Park home with a brick.
Zaloumis was also told that she would have to submit to mental health treatment and have her condition monitored, The AP reports.
The sentencing comes after Zaloumis pleaded guilty to one count of intent to damage or destroy property last month.
Cowell was not present at the hearing, but the court heard how on the night of the break-in he was watching television when he heard a loud bang from his bathroom.
Speaking to Digital Spy in the wake of the incident, Cowell's close friend Sinitta admitted that the X Factor boss had initially thought it was her climbing through his window.