Former child film star Skye McCole Bartusiak has died in her sleep at the age of 21.

Bartusiak, who played Mel Gibson‘s daughter in the 2000 war epic The Patriot, died yesterday (July 19) at her Texas home.

Born in Houston in 1992, Bartusiak made her acting debut in the television miniseries Storm of the Century in 1999, which was written by Stephen King.

That year she also appeared in the TV legal drama JAG, as well as the Oscar-winning film The Cider House Rules.

Bartusiak went on to play roles on hit TV shows such as CSI: Crime Scene Investigation, 24, House and Lost.

The cause of death was not immediately known. TMZ reported that no foul play is suspected, pending the results of toxicology tests.