The male, whose identity has not been released, reportedly showed up at the gate of Theron's Hollywood Hills home to deliver flowers to the Monster star.

She told the guy to "just leave them" at the front gate, but he refused and demanded to see her in person, reports TMZ.com.

The South African native called the police and the overzealous fan was taken into custody and booked for stalking.

Theron has yet to comment on the incident.