Actress Skye McCole Bartusiak, known for childhood roles in numerous films and TV shows like The Patriot, The Cider House Rules, Lost, House and CSI, was found dead on Saturday. A native of Houston, the 21-year-old actress has recently produced and starred in several shorts, including Frame of Reference and Bushido last year, and Sick Boy in 2012.   She was 21.

Skye McCole Bartusiak
Skye starred in a number of successful films and TV shows in her childhood.

Bartusiak had been living in a garage apartment at her partents’ home in Texas, which is where she was found, unresponsive, on July 19. She was discovered by her boyfriend, The LA Times reports. According to TMZ, Skye passed away in her sleep.

Since the tragedy made headlines this weekend, Bartusiak’s mother has come out with a statement, saying that she does not believe drugs or alcohol were to blame for her daughter’s death. According to her, the 21-year-old woman was happy and healthy and did not have any previous history of substance abuse. The actual cause of death is still unknown.

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In the wake of the heartbreaking news, actress Abigail Breslin also responded with a message, honoring Bartusiak’s memory. The two young women were reportedly close friends.

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"One of my very good friends and someone who was like a sister to me, Skye McCole Bartusiak passed away today. So devastated," Breslin tweeted.