"Friday Night Lights" star Billy Bob Thornton has been accused of harassment by his former sister-in-law.

According to the Los Angeles Police Department report that Elysabeth Cherniak has filed, the actor has been bugging her home and regularly sends her insulting emails for almost two years.

Cherniak is the sister of Pietra, who had been married to the actor/director from 1993 to 1997.

TMZ.com reports that the authorities are waiting for the sister-in-law to bring in the copies of the emails and other evidences so they can continue with their investigation.

However, the 52-year-old actor's rep says, "Billy doesn't use e-mail and never has. Anyone who knows him would know that."

The spokesperson adds that Cherniak has "a history of making these very same false accusations in the past."

Aside from Pietra, Thornton had also been married to four other women in the past, most notably was Angelina Jolie.