Nicki Aycox, who was known to Supernatural fans for playing Meg Masters

in the first and fourth seasons of the series, has passed away at age 47.

CBR reports Aycox was diagnosed with leukemia over a year ago,

and her sister-in-law took to Facebook this week to reveal she had passed away.

In addition to her role on Supernatural,

Aycox was also known for playing Grace in Perfect Stranger and Minxie Hayes in Jeepers Creepers 2.

"My beautiful, smart, fierce, incredibly talented, and loving sister-in-law

Nicki Aycox Raab, passed away yesterday with my brother, Matt Raab, by her side

Nicki and Matt had a wonderful life together in California.

She was definitely a fighter and everyone who knew her loved her 💔

Susan Raab Ceklosky wrote on Facebook.