Funnywoman Roseanne Barr is facing a lawsuit from the parents of controversial shooter George Zimmerman over allegations she pushed them into hiding by tweeting the family's address.

Robert Zimmerman, Sr. and his wife, Gladys, claim in a lawsuit filed in Florida on Monday (10Mar14) that they feared they would become the targets of "vigilante justice" after Barr shared details of their Lake Mary property in March, 2012.

The tweets came at a time of high tension between the African-American community and Florida police, who had not yet arrested Zimmerman for the fatal shooting of black teenager Trayvon Martin.

The Zimmermans accuse the star of trying to "incite a lynch mob to descend" on their home and are seeking unspecified damages.

George Zimmerman was arrested in relation to Martin's death in April, 2012 but was acquitted of second-degree murder and manslaughter last year (13) after a jury ruled he had acted in self-defence.