United Kingdom, March 26 -- Bruce Willis' 90-year-old mother Marlene Willis has been hailed as an "icon" after 22 years volunteering with the LAPD.

The Die Hard actor's mother, known as Mrs Willis to those at the Los Angeles Police Department's West LA station, is still helping out on Tuesday, Wednesday and Thursday afternoons by checking grammar and adding notes to police reports.

Captain Rich Gabaldon, the station's commanding officer, told NBC Los Angeles: "Mrs. Willis is a very integral part of West Los Angeles and the LAPD.

"She's an icon here."

Marlene described the LAPD as her "family", adding that she is delighted to do her part.

She added: "I want to help so much, so much. You have no idea. You cannot imagine how much I want...