Skye McCole Bartusiak, who may be best known as playing Mel Gibson's daughter in The Patriot, was found dead in her home on Saturday in Texas.
The cause of death has not yet been determined, but there is no evidence of foul play.
Bartusiak's mother told CNN that her daughter had been suffering from epileptic seizures and her boyfriend found her sitting up in her bed. She believes her daughter may have had a seizure and choked because nobody was there to assist. They worked on her for 45 minutes but couldn't revive her.
Bartusiak had consistent work in TV movies and mini series. She may also be known to 24 fans as Megan Matheson, the abused child Kim Bauer babysat in season two. She also starred as young Charlie McGee in Firestarter 2: Rekindled.